31683134173 has 2 divisors, whose sum is σ = 31683134174. Its totient is φ = 31683134172.

The previous prime is 31683134089. The next prime is 31683134183. The reversal of 31683134173 is 37143138613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21385552644 + 10297581529 = 146238^2 + 101477^2 .

It is a cyclic number.

It is not a de Polignac number, because 31683134173 - 2⁹ = 31683133661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31683134183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15841567086 + 15841567087.

It is an arithmetic number, because the mean of its divisors is an integer number (15841567087).

Almost surely, 2^31683134173 is an apocalyptic number.

It is an amenable number.

31683134173 is a deficient number, since it is larger than the sum of its proper divisors (1).

31683134173 is an equidigital number, since it uses as much as digits as its factorization.

31683134173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 40.

The spelling of 31683134173 in words is "thirty-one billion, six hundred eighty-three million, one hundred thirty-four thousand, one hundred seventy-three".