972173919 has 16 divisors (see below), whose sum is σ = 1370686464. Its totient is φ = 611908800.

The previous prime is 972173911. The next prime is 972173933. The reversal of 972173919 is 919371279.

It is a happy number.

It is not a de Polignac number, because 972173919 - 2³ = 972173911 is a prime.

It is a super-2 number, since 2×972173919² = 1890244257567637122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (972173911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123669 + ... + 131294.

It is an arithmetic number, because the mean of its divisors is an integer number (85667904).

Almost surely, 2^972173919 is an apocalyptic number.

972173919 is a deficient number, since it is larger than the sum of its proper divisors (398512545).

972173919 is a wasteful number, since it uses less digits than its factorization.

972173919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255038.

The product of its digits is 214326, while the sum is 48.

The square root of 972173919 is about 31179.7036387455. The cubic root of 972173919 is about 990.6372522031.

The spelling of 972173919 in words is "nine hundred seventy-two million, one hundred seventy-three thousand, nine hundred nineteen".