31064609 has 2 divisors, whose sum is σ = 31064610. Its totient is φ = 31064608.

The previous prime is 31064591. The next prime is 31064611. The reversal of 31064609 is 90646013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18835600 + 12229009 = 4340^2 + 3497^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31064609 is a prime.

Together with 31064611, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31064689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15532304 + 15532305.

It is an arithmetic number, because the mean of its divisors is an integer number (15532305).

Almost surely, 2^31064609 is an apocalyptic number.

It is an amenable number.

31064609 is a deficient number, since it is larger than the sum of its proper divisors (1).

31064609 is an equidigital number, since it uses as much as digits as its factorization.

31064609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 31064609 is about 5573.5634023486. The cubic root of 31064609 is about 314.3561519318.

The spelling of 31064609 in words is "thirty-one million, sixty-four thousand, six hundred nine".