12990923 has 12 divisors (see below), whose sum is σ = 14434224. Its totient is φ = 11682000.

The previous prime is 12990899. The next prime is 12990949. The reversal of 12990923 is 32909921.

It is not a de Polignac number, because 12990923 - 2⁸ = 12990667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12990223) 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 11 ways as a sum of consecutive naturals, for example, 11690 + ... + 12752.

It is an arithmetic number, because the mean of its divisors is an integer number (1202852).

Almost surely, 2^12990923 is an apocalyptic number.

12990923 is a deficient number, since it is larger than the sum of its proper divisors (1443301).

12990923 is a wasteful number, since it uses less digits than its factorization.

12990923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1186 (or 1175 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 12990923 is about 3604.2923022419. The cubic root of 12990923 is about 235.0787302225.

The spelling of 12990923 in words is "twelve million, nine hundred ninety thousand, nine hundred twenty-three".