38999971 has 2 divisors, whose sum is σ = 38999972. Its totient is φ = 38999970.

The previous prime is 38999969. The next prime is 38999981. The reversal of 38999971 is 17999983.

38999971 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 is a cyclic number.

It is not a de Polignac number, because 38999971 - 2¹ = 38999969 is a prime.

Together with 38999969, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (38999911) 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, 19499985 + 19499986.

It is an arithmetic number, because the mean of its divisors is an integer number (19499986).

Almost surely, 2^38999971 is an apocalyptic number.

38999971 is a deficient number, since it is larger than the sum of its proper divisors (1).

38999971 is an equidigital number, since it uses as much as digits as its factorization.

38999971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1102248, while the sum is 55.

The square root of 38999971 is about 6244.9956765397. The cubic root of 38999971 is about 339.1210602457.

The spelling of 38999971 in words is "thirty-eight million, nine hundred ninety-nine thousand, nine hundred seventy-one".