31607388493 has 2 divisors, whose sum is σ = 31607388494. Its totient is φ = 31607388492.

The previous prime is 31607388451. The next prime is 31607388503. The reversal of 31607388493 is 39488370613.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31285473129 + 321915364 = 176877^2 + 17942^2 .

It is an emirp because it is prime and its reverse (39488370613) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31607388493 is a prime.

It is a super-2 number, since 2×31607388493² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31607388493.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31607388413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15803694246 + 15803694247.

It is an arithmetic number, because the mean of its divisors is an integer number (15803694247).

Almost surely, 2^31607388493 is an apocalyptic number.

It is an amenable number.

31607388493 is a deficient number, since it is larger than the sum of its proper divisors (1).

31607388493 is an equidigital number, since it uses as much as digits as its factorization.

31607388493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2612736, while the sum is 52.

The spelling of 31607388493 in words is "thirty-one billion, six hundred seven million, three hundred eighty-eight thousand, four hundred ninety-three".