38664931 has 4 divisors (see below), whose sum is σ = 39394512. Its totient is φ = 37935352.

The previous prime is 38664929. The next prime is 38664937. The reversal of 38664931 is 13946683.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 38664931 - 2¹ = 38664929 is a prime.

It is a super-2 number, since 2×38664931² = 2989953778469522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38664937) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 364711 + ... + 364816.

It is an arithmetic number, because the mean of its divisors is an integer number (9848628).

Almost surely, 2^38664931 is an apocalyptic number.

38664931 is a deficient number, since it is larger than the sum of its proper divisors (729581).

38664931 is an equidigital number, since it uses as much as digits as its factorization.

38664931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729580.

The product of its digits is 93312, while the sum is 40.

The square root of 38664931 is about 6218.1131382438. The cubic root of 38664931 is about 338.1471617387.

The spelling of 38664931 in words is "thirty-eight million, six hundred sixty-four thousand, nine hundred thirty-one".