972471779 has 4 divisors (see below), whose sum is σ = 974600184. Its totient is φ = 970343376.

The previous prime is 972471769. The next prime is 972471811. The reversal of 972471779 is 977174279.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 972471779 - 2⁸ = 972471523 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 972471779.

It is not an unprimeable number, because it can be changed into a prime (972471749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1063517 + ... + 1064430.

It is an arithmetic number, because the mean of its divisors is an integer number (243650046).

Almost surely, 2^972471779 is an apocalyptic number.

972471779 is a deficient number, since it is larger than the sum of its proper divisors (2128405).

972471779 is a wasteful number, since it uses less digits than its factorization.

972471779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2128404.

The product of its digits is 1555848, while the sum is 53.

The square root of 972471779 is about 31184.4797776073. The cubic root of 972471779 is about 990.7384141715.

The spelling of 972471779 in words is "nine hundred seventy-two million, four hundred seventy-one thousand, seven hundred seventy-nine".