72973601931 has 8 divisors (see below), whose sum is σ = 97328004160. Its totient is φ = 48634133832.

The previous prime is 72973601927. The next prime is 72973601947. The reversal of 72973601931 is 13910637927.

It is a happy number.

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

It is not a de Polignac number, because 72973601931 - 2² = 72973601927 is a prime.

It is a super-2 number, since 2×72973601931² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72973601951) 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, 3722125 + ... + 3741678.

It is an arithmetic number, because the mean of its divisors is an integer number (12166000520).

Almost surely, 2^72973601931 is an apocalyptic number.

72973601931 is a deficient number, since it is larger than the sum of its proper divisors (24354402229).

72973601931 is a wasteful number, since it uses less digits than its factorization.

72973601931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7467065.

The product of its (nonzero) digits is 428652, while the sum is 48.

The spelling of 72973601931 in words is "seventy-two billion, nine hundred seventy-three million, six hundred one thousand, nine hundred thirty-one".