12609731 has 2 divisors, whose sum is σ = 12609732. Its totient is φ = 12609730.

The previous prime is 12609713. The next prime is 12609757. The reversal of 12609731 is 13790621.

Together with previous prime (12609713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12609731 - 2²² = 8415427 is a prime.

It is a super-2 number, since 2×12609731² = 318010631784722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 12609694 and 12609703.

It is not a weakly prime, because it can be changed into another prime (12609761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6304865 + 6304866.

It is an arithmetic number, because the mean of its divisors is an integer number (6304866).

Almost surely, 2^12609731 is an apocalyptic number.

12609731 is a deficient number, since it is larger than the sum of its proper divisors (1).

12609731 is an equidigital number, since it uses as much as digits as its factorization.

12609731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 12609731 is about 3551.0183046557. The cubic root of 12609731 is about 232.7565657347.

The spelling of 12609731 in words is "twelve million, six hundred nine thousand, seven hundred thirty-one".