31910973673 has 2 divisors, whose sum is σ = 31910973674. Its totient is φ = 31910973672.

The previous prime is 31910973637. The next prime is 31910973709. The reversal of 31910973673 is 37637901913.

Together with previous prime (31910973637) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (31910973637) and next prime (31910973709).

It can be written as a sum of positive squares in only one way, i.e., 19922475609 + 11988498064 = 141147^2 + 109492^2 .

It is a cyclic number.

It is not a de Polignac number, because 31910973673 - 2²⁵ = 31877419241 is a prime.

It is a super-2 number, since 2×31910973673² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31910923673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15955486836 + 15955486837.

It is an arithmetic number, because the mean of its divisors is an integer number (15955486837).

Almost surely, 2^31910973673 is an apocalyptic number.

It is an amenable number.

31910973673 is a deficient number, since it is larger than the sum of its proper divisors (1).

31910973673 is an equidigital number, since it uses as much as digits as its factorization.

31910973673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 642978, while the sum is 49.

The spelling of 31910973673 in words is "thirty-one billion, nine hundred ten million, nine hundred seventy-three thousand, six hundred seventy-three".