972172487 has 64 divisors (see below), whose sum is σ = 1285079040. Its totient is φ = 721353600.

The previous prime is 972172477. The next prime is 972172501. The reversal of 972172487 is 784271279.

It is not a de Polignac number, because 972172487 - 2⁴ = 972172471 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (972172457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2936912 + ... + 2937242.

It is an arithmetic number, because the mean of its divisors is an integer number (20079360).

Almost surely, 2^972172487 is an apocalyptic number.

972172487 is a deficient number, since it is larger than the sum of its proper divisors (312906553).

972172487 is a wasteful number, since it uses less digits than its factorization.

972172487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444.

The product of its digits is 395136, while the sum is 47.

The square root of 972172487 is about 31179.6806750807. The cubic root of 972172487 is about 990.6367658041.

The spelling of 972172487 in words is "nine hundred seventy-two million, one hundred seventy-two thousand, four hundred eighty-seven".