31422738689 has 2 divisors, whose sum is σ = 31422738690. Its totient is φ = 31422738688.

The previous prime is 31422738649. The next prime is 31422738709. The reversal of 31422738689 is 98683722413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28529912464 + 2892826225 = 168908^2 + 53785^2 .

It is a cyclic number.

It is not a de Polignac number, because 31422738689 - 2¹⁶ = 31422673153 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31422738689.

It is not a weakly prime, because it can be changed into another prime (31422738649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15711369344 + 15711369345.

It is an arithmetic number, because the mean of its divisors is an integer number (15711369345).

Almost surely, 2^31422738689 is an apocalyptic number.

It is an amenable number.

31422738689 is a deficient number, since it is larger than the sum of its proper divisors (1).

31422738689 is an equidigital number, since it uses as much as digits as its factorization.

31422738689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3483648, while the sum is 53.

The spelling of 31422738689 in words is "thirty-one billion, four hundred twenty-two million, seven hundred thirty-eight thousand, six hundred eighty-nine".