389496931 has 2 divisors, whose sum is σ = 389496932. Its totient is φ = 389496930.

The previous prime is 389496907. The next prime is 389496997. The reversal of 389496931 is 139694983.

It is a weak prime.

It is an emirp because it is prime and its reverse (139694983) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-389496931 is a prime.

It is a super-2 number, since 2×389496931² = 303415718516837522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (389496901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194748465 + 194748466.

It is an arithmetic number, because the mean of its divisors is an integer number (194748466).

Almost surely, 2^389496931 is an apocalyptic number.

389496931 is a deficient number, since it is larger than the sum of its proper divisors (1).

389496931 is an equidigital number, since it uses as much as digits as its factorization.

389496931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1259712, while the sum is 52.

The square root of 389496931 is about 19735.6766035523. The cubic root of 389496931 is about 730.3000774199.

The spelling of 389496931 in words is "three hundred eighty-nine million, four hundred ninety-six thousand, nine hundred thirty-one".