12431929 has 2 divisors, whose sum is σ = 12431930. Its totient is φ = 12431928.

The previous prime is 12431927. The next prime is 12431941. The reversal of 12431929 is 92913421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10112400 + 2319529 = 3180^2 + 1523^2 .

It is a cyclic number.

It is not a de Polignac number, because 12431929 - 2¹ = 12431927 is a prime.

It is a super-2 number, since 2×12431929² = 309105717322082, which contains 22 as substring.

Together with 12431927, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 12431929.

It is not a weakly prime, because it can be changed into another prime (12431927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6215964 + 6215965.

It is an arithmetic number, because the mean of its divisors is an integer number (6215965).

Almost surely, 2^12431929 is an apocalyptic number.

It is an amenable number.

12431929 is a deficient number, since it is larger than the sum of its proper divisors (1).

12431929 is an equidigital number, since it uses as much as digits as its factorization.

12431929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 31.

The square root of 12431929 is about 3525.8940710123. The cubic root of 12431929 is about 231.6573978545.

The spelling of 12431929 in words is "twelve million, four hundred thirty-one thousand, nine hundred twenty-nine".