31379615497 has 2 divisors, whose sum is σ = 31379615498. Its totient is φ = 31379615496.

The previous prime is 31379615489. The next prime is 31379615537. The reversal of 31379615497 is 79451697313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25441526016 + 5938089481 = 159504^2 + 77059^2 .

It is a cyclic number.

It is not a de Polignac number, because 31379615497 - 2³ = 31379615489 is a prime.

It is not a weakly prime, because it can be changed into another prime (31379615437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15689807748 + 15689807749.

It is an arithmetic number, because the mean of its divisors is an integer number (15689807749).

Almost surely, 2^31379615497 is an apocalyptic number.

It is an amenable number.

31379615497 is a deficient number, since it is larger than the sum of its proper divisors (1).

31379615497 is an equidigital number, since it uses as much as digits as its factorization.

31379615497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4286520, while the sum is 55.

The spelling of 31379615497 in words is "thirty-one billion, three hundred seventy-nine million, six hundred fifteen thousand, four hundred ninety-seven".