31983539117 has 4 divisors (see below), whose sum is σ = 31987029696. Its totient is φ = 31980048540.

The previous prime is 31983539113. The next prime is 31983539141. The reversal of 31983539117 is 71193538913.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71193538913 = 7 ⋅10170505559.

It is a cyclic number.

It is not a de Polignac number, because 31983539117 - 2² = 31983539113 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31983539113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1731509 + ... + 1749882.

It is an arithmetic number, because the mean of its divisors is an integer number (7996757424).

Almost surely, 2^31983539117 is an apocalyptic number.

It is an amenable number.

31983539117 is a deficient number, since it is larger than the sum of its proper divisors (3490579).

31983539117 is an equidigital number, since it uses as much as digits as its factorization.

31983539117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3490578.

The product of its digits is 612360, while the sum is 50.

The spelling of 31983539117 in words is "thirty-one billion, nine hundred eighty-three million, five hundred thirty-nine thousand, one hundred seventeen".