31904687818741 has 2 divisors, whose sum is σ = 31904687818742. Its totient is φ = 31904687818740.

The previous prime is 31904687818723. The next prime is 31904687818769. The reversal of 31904687818741 is 14781878640913.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25935236802225 + 5969451016516 = 5092665^2 + 2443246^2 .

It is an emirp because it is prime and its reverse (14781878640913) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31904687818741 - 2¹⁵ = 31904687785973 is a prime.

It is a super-3 number, since 3×31904687818741³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31904687816741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15952343909370 + 15952343909371.

It is an arithmetic number, because the mean of its divisors is an integer number (15952343909371).

Almost surely, 2^{31904687818741} is an apocalyptic number.

It is an amenable number.

31904687818741 is a deficient number, since it is larger than the sum of its proper divisors (1).

31904687818741 is an equidigital number, since it uses as much as digits as its factorization.

31904687818741 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 65028096, while the sum is 67.

The spelling of 31904687818741 in words is "thirty-one trillion, nine hundred four billion, six hundred eighty-seven million, eight hundred eighteen thousand, seven hundred forty-one".