972123531 has 8 divisors (see below), whose sum is σ = 1304864400. Its totient is φ = 643732512.

The previous prime is 972123491. The next prime is 972123539. The reversal of 972123531 is 135321279.

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

It is not a de Polignac number, because 972123531 - 2¹⁰ = 972122507 is a prime.

It is a super-2 number, since 2×972123531² = 1890048319047815922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 972123492 and 972123501.

It is not an unprimeable number, because it can be changed into a prime (972123539) 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, 1086940 + ... + 1087833.

It is an arithmetic number, because the mean of its divisors is an integer number (163108050).

Almost surely, 2^972123531 is an apocalyptic number.

972123531 is a deficient number, since it is larger than the sum of its proper divisors (332740869).

972123531 is a wasteful number, since it uses less digits than its factorization.

972123531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2174925.

The product of its digits is 11340, while the sum is 33.

The square root of 972123531 is about 31178.8956026348. The cubic root of 972123531 is about 990.6201369211.

The spelling of 972123531 in words is "nine hundred seventy-two million, one hundred twenty-three thousand, five hundred thirty-one".