38999957 has 4 divisors (see below), whose sum is σ = 39469920. Its totient is φ = 38529996.

The previous prime is 38999911. The next prime is 38999959. The reversal of 38999957 is 75999983.

38999957 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75999983 = 149 ⋅510067.

It is a cyclic number.

It is not a de Polignac number, because 38999957 - 2¹⁰ = 38998933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 38999896 and 38999905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38999959) 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 in 3 ways as a sum of consecutive naturals, for example, 234857 + ... + 235022.

It is an arithmetic number, because the mean of its divisors is an integer number (9867480).

Almost surely, 2^38999957 is an apocalyptic number.

It is an amenable number.

38999957 is a deficient number, since it is larger than the sum of its proper divisors (469963).

38999957 is an equidigital number, since it uses as much as digits as its factorization.

38999957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469962.

The product of its digits is 5511240, while the sum is 59.

The square root of 38999957 is about 6244.9945556421. The cubic root of 38999957 is about 339.1210196671.

The spelling of 38999957 in words is "thirty-eight million, nine hundred ninety-nine thousand, nine hundred fifty-seven".