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38000981 is a prime number
BaseRepresentation
bin1001000011110…
…1100101010101
32122111122112202
42100331211111
534212012411
63434254245
7641001014
oct220754525
978448482
1038000981
111a4a5777
1210887385
137b469b5
145092a7b
15350983b
hex243d955

38000981 has 2 divisors, whose sum is σ = 38000982. Its totient is φ = 38000980.

The previous prime is 38000959. The next prime is 38001023. The reversal of 38000981 is 18900083.

It is a happy number.

38000981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34409956 + 3591025 = 5866^2 + 1895^2 .

It is a cyclic number.

It is not a de Polignac number, because 38000981 - 26 = 38000917 is a prime.

It is a super-2 number, since 2×380009812 = 2888149113924722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38000681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19000490 + 19000491.

It is an arithmetic number, because the mean of its divisors is an integer number (19000491).

Almost surely, 238000981 is an apocalyptic number.

It is an amenable number.

38000981 is a deficient number, since it is larger than the sum of its proper divisors (1).

38000981 is an equidigital number, since it uses as much as digits as its factorization.

38000981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 38000981 is about 6164.4935720625. The cubic root of 38000981 is about 336.2004337233.

The spelling of 38000981 in words is "thirty-eight million, nine hundred eighty-one", and thus it is an aban number.