12408931 has 4 divisors (see below), whose sum is σ = 12420864. Its totient is φ = 12397000.

The previous prime is 12408923. The next prime is 12408971. The reversal of 12408931 is 13980421.

It is a happy number.

12408931 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12408931 - 2³ = 12408923 is a prime.

It is a super-2 number, since 2×12408931² = 307963137125522, 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 12408931.

It is not an unprimeable number, because it can be changed into a prime (12408971) 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 in 3 ways as a sum of consecutive naturals, for example, 4240 + ... + 6541.

It is an arithmetic number, because the mean of its divisors is an integer number (3105216).

Almost surely, 2^12408931 is an apocalyptic number.

12408931 is a deficient number, since it is larger than the sum of its proper divisors (11933).

12408931 is a wasteful number, since it uses less digits than its factorization.

12408931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11932.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 12408931 is about 3522.6312608617. The cubic root of 12408931 is about 231.5144609203.

The spelling of 12408931 in words is "twelve million, four hundred eight thousand, nine hundred thirty-one".