31746120907 has 4 divisors (see below), whose sum is σ = 32421570336. Its totient is φ = 31070671480.

The previous prime is 31746120877. The next prime is 31746120919. The reversal of 31746120907 is 70902164713.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70902164713 = 137 ⋅517534049.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31746120907 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31746120907.

It is not an unprimeable number, because it can be changed into a prime (31746121907) 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, 337724644 + ... + 337724737.

It is an arithmetic number, because the mean of its divisors is an integer number (8105392584).

Almost surely, 2^31746120907 is an apocalyptic number.

31746120907 is a deficient number, since it is larger than the sum of its proper divisors (675449429).

31746120907 is an equidigital number, since it uses as much as digits as its factorization.

31746120907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675449428.

The product of its (nonzero) digits is 63504, while the sum is 40.

The spelling of 31746120907 in words is "thirty-one billion, seven hundred forty-six million, one hundred twenty thousand, nine hundred seven".