972491779 has 8 divisors (see below), whose sum is σ = 1134101600. Its totient is φ = 833564088.

The previous prime is 972491777. The next prime is 972491789. The reversal of 972491779 is 977194279.

972491779 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 972491779 - 2¹ = 972491777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (972491777) 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, 1417284 + ... + 1417969.

It is an arithmetic number, because the mean of its divisors is an integer number (141762700).

Almost surely, 2^972491779 is an apocalyptic number.

972491779 is a deficient number, since it is larger than the sum of its proper divisors (161609821).

972491779 is an equidigital number, since it uses as much as digits as its factorization.

972491779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2835274 (or 2835260 counting only the distinct ones).

The product of its digits is 2000376, while the sum is 55.

The square root of 972491779 is about 31184.8004482953. The cubic root of 972491779 is about 990.7452060164.

The spelling of 972491779 in words is "nine hundred seventy-two million, four hundred ninety-one thousand, seven hundred seventy-nine".