31927857473 has 2 divisors, whose sum is σ = 31927857474. Its totient is φ = 31927857472.

The previous prime is 31927857461. The next prime is 31927857509. The reversal of 31927857473 is 37475872913.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30323694769 + 1604162704 = 174137^2 + 40052^2 .

It is a cyclic number.

It is not a de Polignac number, because 31927857473 - 2¹⁶ = 31927791937 is a prime.

It is not a weakly prime, because it can be changed into another prime (31927857413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15963928736 + 15963928737.

It is an arithmetic number, because the mean of its divisors is an integer number (15963928737).

Almost surely, 2^31927857473 is an apocalyptic number.

It is an amenable number.

31927857473 is a deficient number, since it is larger than the sum of its proper divisors (1).

31927857473 is an equidigital number, since it uses as much as digits as its factorization.

31927857473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8890560, while the sum is 56.

The spelling of 31927857473 in words is "thirty-one billion, nine hundred twenty-seven million, eight hundred fifty-seven thousand, four hundred seventy-three".