31466689 has 2 divisors, whose sum is σ = 31466690. Its totient is φ = 31466688.

The previous prime is 31466671. The next prime is 31466693. The reversal of 31466689 is 98666413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23931664 + 7535025 = 4892^2 + 2745^2 .

It is a cyclic number.

It is not a de Polignac number, because 31466689 - 2⁵ = 31466657 is a prime.

It is not a weakly prime, because it can be changed into another prime (31466629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15733344 + 15733345.

It is an arithmetic number, because the mean of its divisors is an integer number (15733345).

Almost surely, 2^31466689 is an apocalyptic number.

It is an amenable number.

31466689 is a deficient number, since it is larger than the sum of its proper divisors (1).

31466689 is an equidigital number, since it uses as much as digits as its factorization.

31466689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 43.

The square root of 31466689 is about 5609.5177154547. The cubic root of 31466689 is about 315.7066156156.

The spelling of 31466689 in words is "thirty-one million, four hundred sixty-six thousand, six hundred eighty-nine".