31974771387697 has 16 divisors (see below), whose sum is σ = 33609290768640. Its totient is φ = 30360621595392.

The previous prime is 31974771387673. The next prime is 31974771387719. The reversal of 31974771387697 is 79678317747913.

It is a cyclic number.

It is not a de Polignac number, because 31974771387697 - 2²³ = 31974762999089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31974271387697) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182490829 + ... + 182665957.

It is an arithmetic number, because the mean of its divisors is an integer number (2100580673040).

Almost surely, 2^{31974771387697} is an apocalyptic number.

It is an amenable number.

31974771387697 is a deficient number, since it is larger than the sum of its proper divisors (1634519380943).

31974771387697 is a wasteful number, since it uses less digits than its factorization.

31974771387697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233232.

The product of its digits is 2352442176, while the sum is 79.

The spelling of 31974771387697 in words is "thirty-one trillion, nine hundred seventy-four billion, seven hundred seventy-one million, three hundred eighty-seven thousand, six hundred ninety-seven".