31368009 has 16 divisors (see below), whose sum is σ = 44684352. Its totient is φ = 19504128.

The previous prime is 31367989. The next prime is 31368019. The reversal of 31368009 is 90086313.

It is not a de Polignac number, because 31368009 - 2²⁰ = 30319433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31368019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3042 + ... + 8484.

It is an arithmetic number, because the mean of its divisors is an integer number (2792772).

Almost surely, 2^31368009 is an apocalyptic number.

It is an amenable number.

31368009 is a deficient number, since it is larger than the sum of its proper divisors (13316343).

31368009 is a wasteful number, since it uses less digits than its factorization.

31368009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5576.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 31368009 is about 5600.7150436351. The cubic root of 31368009 is about 315.3762498323.

The spelling of 31368009 in words is "thirty-one million, three hundred sixty-eight thousand, nine".