31064689 has 2 divisors, whose sum is σ = 31064690. Its totient is φ = 31064688.

The previous prime is 31064653. The next prime is 31064699. The reversal of 31064689 is 98646013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30030400 + 1034289 = 5480^2 + 1017^2 .

It is a cyclic number.

It is not a de Polignac number, because 31064689 - 2¹³ = 31056497 is a prime.

It is not a weakly prime, because it can be changed into another prime (31064609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15532344 + 15532345.

It is an arithmetic number, because the mean of its divisors is an integer number (15532345).

Almost surely, 2^31064689 is an apocalyptic number.

It is an amenable number.

31064689 is a deficient number, since it is larger than the sum of its proper divisors (1).

31064689 is an equidigital number, since it uses as much as digits as its factorization.

31064689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 31064689 is about 5573.5705790812. The cubic root of 31064689 is about 314.3564217830.

The spelling of 31064689 in words is "thirty-one million, sixty-four thousand, six hundred eighty-nine".