12990907 has 4 divisors (see below), whose sum is σ = 13755096. Its totient is φ = 12226720.

The previous prime is 12990899. The next prime is 12990949. The reversal of 12990907 is 70909921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70909921 = 2411 ⋅29411.

It is a cyclic number.

It is not a de Polignac number, because 12990907 - 2³ = 12990899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12990007) 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, 382069 + ... + 382102.

It is an arithmetic number, because the mean of its divisors is an integer number (3438774).

Almost surely, 2^12990907 is an apocalyptic number.

12990907 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

12990907 is a deficient number, since it is larger than the sum of its proper divisors (764189).

12990907 is an equidigital number, since it uses as much as digits as its factorization.

12990907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764188.

The product of its (nonzero) digits is 10206, while the sum is 37.

The square root of 12990907 is about 3604.2900826654. The cubic root of 12990907 is about 235.0786337125.

The spelling of 12990907 in words is "twelve million, nine hundred ninety thousand, nine hundred seven".