12613931 has 16 divisors (see below), whose sum is σ = 14432256. Its totient is φ = 10920000.

The previous prime is 12613903. The next prime is 12613933. The reversal of 12613931 is 13931621.

12613931 = 386² + 387² + ... + 456².

12613931 is nontrivially palindromic in base 5.

It is a cyclic number.

It is not a de Polignac number, because 12613931 - 2¹⁰ = 12612907 is a prime.

It is a super-2 number, since 2×12613931² = 318222510545522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12613931.

It is not an unprimeable number, because it can be changed into a prime (12613933) 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, 23951 + ... + 24471.

It is an arithmetic number, because the mean of its divisors is an integer number (902016).

Almost surely, 2^12613931 is an apocalyptic number.

12613931 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12613931 is a deficient number, since it is larger than the sum of its proper divisors (1818325).

12613931 is a wasteful number, since it uses less digits than its factorization.

12613931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634.

The product of its digits is 972, while the sum is 26.

The square root of 12613931 is about 3551.6096350810. The cubic root of 12613931 is about 232.7824047491.

The spelling of 12613931 in words is "twelve million, six hundred thirteen thousand, nine hundred thirty-one".