31459373993 has 2 divisors, whose sum is σ = 31459373994. Its totient is φ = 31459373992.

The previous prime is 31459373989. The next prime is 31459374031. The reversal of 31459373993 is 39937395413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28443497104 + 3015876889 = 168652^2 + 54917^2 .

It is a cyclic number.

It is not a de Polignac number, because 31459373993 - 2² = 31459373989 is a prime.

It is not a weakly prime, because it can be changed into another prime (31459373093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15729686996 + 15729686997.

It is an arithmetic number, because the mean of its divisors is an integer number (15729686997).

Almost surely, 2^31459373993 is an apocalyptic number.

It is an amenable number.

31459373993 is a deficient number, since it is larger than the sum of its proper divisors (1).

31459373993 is an equidigital number, since it uses as much as digits as its factorization.

31459373993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8266860, while the sum is 56.

The spelling of 31459373993 in words is "thirty-one billion, four hundred fifty-nine million, three hundred seventy-three thousand, nine hundred ninety-three".