12923956831 has 4 divisors (see below), whose sum is σ = 13105984464. Its totient is φ = 12741929200.

The previous prime is 12923956817. The next prime is 12923956853. The reversal of 12923956831 is 13865932921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13865932921 = 17 ⋅815643113.

It is a cyclic number.

It is not a de Polignac number, because 12923956831 - 2²¹ = 12921859679 is a prime.

It is a super-2 number, since 2×12923956831² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12923956231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91013710 + ... + 91013851.

It is an arithmetic number, because the mean of its divisors is an integer number (3276496116).

Almost surely, 2^12923956831 is an apocalyptic number.

12923956831 is a deficient number, since it is larger than the sum of its proper divisors (182027633).

12923956831 is an equidigital number, since it uses as much as digits as its factorization.

12923956831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182027632.

The product of its digits is 699840, while the sum is 49.

The spelling of 12923956831 in words is "twelve billion, nine hundred twenty-three million, nine hundred fifty-six thousand, eight hundred thirty-one".