12922913 has 4 divisors (see below), whose sum is σ = 13238148. Its totient is φ = 12607680.

The previous prime is 12922901. The next prime is 12922933. The reversal of 12922913 is 31922921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31922921 = 631 ⋅50591.

It can be written as a sum of positive squares in 2 ways, for example, as 861184 + 12061729 = 928^2 + 3473^2 .

It is a cyclic number.

It is not a de Polignac number, because 12922913 - 2²² = 8728609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12922933) 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, 157556 + ... + 157637.

It is an arithmetic number, because the mean of its divisors is an integer number (3309537).

Almost surely, 2^12922913 is an apocalyptic number.

It is an amenable number.

12922913 is a deficient number, since it is larger than the sum of its proper divisors (315235).

12922913 is an equidigital number, since it uses as much as digits as its factorization.

12922913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315234.

The product of its digits is 1944, while the sum is 29.

The square root of 12922913 is about 3594.8453374241. The cubic root of 12922913 is about 234.6677846864.

The spelling of 12922913 in words is "twelve million, nine hundred twenty-two thousand, nine hundred thirteen".