28104603931 has 2 divisors, whose sum is σ = 28104603932. Its totient is φ = 28104603930.

The previous prime is 28104603907. The next prime is 28104603941. The reversal of 28104603931 is 13930640182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28104603931 - 2⁹ = 28104603419 is a prime.

It is a super-2 number, since 2×28104603931² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28104603941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14052301965 + 14052301966.

It is an arithmetic number, because the mean of its divisors is an integer number (14052301966).

Almost surely, 2^28104603931 is an apocalyptic number.

28104603931 is a deficient number, since it is larger than the sum of its proper divisors (1).

28104603931 is an equidigital number, since it uses as much as digits as its factorization.

28104603931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 37.

The spelling of 28104603931 in words is "twenty-eight billion, one hundred four million, six hundred three thousand, nine hundred thirty-one".