12631897 has 2 divisors, whose sum is σ = 12631898. Its totient is φ = 12631896.

The previous prime is 12631891. The next prime is 12631919. The reversal of 12631897 is 79813621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7160976 + 5470921 = 2676^2 + 2339^2 .

It is a cyclic number.

It is not a de Polignac number, because 12631897 - 2³ = 12631889 is a prime.

It is not a weakly prime, because it can be changed into another prime (12631891) 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 as a sum of consecutive naturals, namely, 6315948 + 6315949.

It is an arithmetic number, because the mean of its divisors is an integer number (6315949).

Almost surely, 2^12631897 is an apocalyptic number.

It is an amenable number.

12631897 is a deficient number, since it is larger than the sum of its proper divisors (1).

12631897 is an equidigital number, since it uses as much as digits as its factorization.

12631897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 37.

The square root of 12631897 is about 3554.1380108263. The cubic root of 12631897 is about 232.8928695122.

It can be divided in two parts, 1263 and 1897, that added together give a triangular number (3160 = T₇₉).

The spelling of 12631897 in words is "twelve million, six hundred thirty-one thousand, eight hundred ninety-seven".