12997387 has 16 divisors (see below), whose sum is σ = 14908320. Its totient is φ = 11232000.

The previous prime is 12997381. The next prime is 12997399. The reversal of 12997387 is 78379921.

It is a happy number.

It is not a de Polignac number, because 12997387 - 2³ = 12997379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12997381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24687 + ... + 25207.

It is an arithmetic number, because the mean of its divisors is an integer number (931770).

Almost surely, 2^12997387 is an apocalyptic number.

12997387 is a deficient number, since it is larger than the sum of its proper divisors (1910933).

12997387 is a wasteful number, since it uses less digits than its factorization.

12997387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654.

The product of its digits is 190512, while the sum is 46.

The square root of 12997387 is about 3605.1888993505. The cubic root of 12997387 is about 235.1177137740.

The spelling of 12997387 in words is "twelve million, nine hundred ninety-seven thousand, three hundred eighty-seven".