31423326689 has 2 divisors, whose sum is σ = 31423326690. Its totient is φ = 31423326688.

The previous prime is 31423326647. The next prime is 31423326703. The reversal of 31423326689 is 98662332413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30983040400 + 440286289 = 176020^2 + 20983^2 .

It is a cyclic number.

It is not a de Polignac number, because 31423326689 - 2³² = 27128359393 is a prime.

It is not a weakly prime, because it can be changed into another prime (31423326629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15711663344 + 15711663345.

It is an arithmetic number, because the mean of its divisors is an integer number (15711663345).

Almost surely, 2^31423326689 is an apocalyptic number.

It is an amenable number.

31423326689 is a deficient number, since it is larger than the sum of its proper divisors (1).

31423326689 is an equidigital number, since it uses as much as digits as its factorization.

31423326689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1119744, while the sum is 47.

The spelling of 31423326689 in words is "thirty-one billion, four hundred twenty-three million, three hundred twenty-six thousand, six hundred eighty-nine".