31064809 has 2 divisors, whose sum is σ = 31064810. Its totient is φ = 31064808.

The previous prime is 31064773. The next prime is 31064819. The reversal of 31064809 is 90846013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25280784 + 5784025 = 5028^2 + 2405^2 .

It is a cyclic number.

It is not a de Polignac number, because 31064809 - 2¹¹ = 31062761 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31064819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15532404 + 15532405.

It is an arithmetic number, because the mean of its divisors is an integer number (15532405).

Almost surely, 2^31064809 is an apocalyptic number.

It is an amenable number.

31064809 is a deficient number, since it is larger than the sum of its proper divisors (1).

31064809 is an equidigital number, since it uses as much as digits as its factorization.

31064809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 31064809 is about 5573.5813441628. The cubic root of 31064809 is about 314.3568265590.

The spelling of 31064809 in words is "thirty-one million, sixty-four thousand, eight hundred nine".