31472874493 has 2 divisors, whose sum is σ = 31472874494. Its totient is φ = 31472874492.

The previous prime is 31472874479. The next prime is 31472874611. The reversal of 31472874493 is 39447827413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22993779769 + 8479094724 = 151637^2 + 92082^2 .

It is a cyclic number.

It is not a de Polignac number, because 31472874493 - 2⁹ = 31472873981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31472874493.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31472874193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15736437246 + 15736437247.

It is an arithmetic number, because the mean of its divisors is an integer number (15736437247).

Almost surely, 2^31472874493 is an apocalyptic number.

It is an amenable number.

31472874493 is a deficient number, since it is larger than the sum of its proper divisors (1).

31472874493 is an equidigital number, since it uses as much as digits as its factorization.

31472874493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4064256, while the sum is 52.

The spelling of 31472874493 in words is "thirty-one billion, four hundred seventy-two million, eight hundred seventy-four thousand, four hundred ninety-three".