31974485739 has 8 divisors (see below), whose sum is σ = 48723025920. Its totient is φ = 18271134696.

The previous prime is 31974485657. The next prime is 31974485747. The reversal of 31974485739 is 93758447913.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31974485739 - 2⁷ = 31974485611 is a prime.

It is a super-2 number, since 2×31974485739² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31974485239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 761297259 + ... + 761297300.

It is an arithmetic number, because the mean of its divisors is an integer number (6090378240).

Almost surely, 2^31974485739 is an apocalyptic number.

31974485739 is a deficient number, since it is larger than the sum of its proper divisors (16748540181).

31974485739 is a wasteful number, since it uses less digits than its factorization.

31974485739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1522594569.

The product of its digits is 22861440, while the sum is 60.

The spelling of 31974485739 in words is "thirty-one billion, nine hundred seventy-four million, four hundred eighty-five thousand, seven hundred thirty-nine".