38740729 has 2 divisors, whose sum is σ = 38740730. Its totient is φ = 38740728.

The previous prime is 38740727. The next prime is 38740747. The reversal of 38740729 is 92704783.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20720704 + 18020025 = 4552^2 + 4245^2 .

It is a cyclic number.

It is not a de Polignac number, because 38740729 - 2¹ = 38740727 is a prime.

Together with 38740727, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 38740691 and 38740700.

It is not a weakly prime, because it can be changed into another prime (38740727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19370364 + 19370365.

It is an arithmetic number, because the mean of its divisors is an integer number (19370365).

Almost surely, 2^38740729 is an apocalyptic number.

It is an amenable number.

38740729 is a deficient number, since it is larger than the sum of its proper divisors (1).

38740729 is an equidigital number, since it uses as much as digits as its factorization.

38740729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 38740729 is about 6224.2050898087. The cubic root of 38740729 is about 338.3679832718.

The spelling of 38740729 in words is "thirty-eight million, seven hundred forty thousand, seven hundred twenty-nine".