972779 has 4 divisors (see below), whose sum is σ = 978576. Its totient is φ = 966984.

The previous prime is 972721. The next prime is 972787. The reversal of 972779 is 977279.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 977279 = 17 ⋅57487.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-972779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (972799) 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, 2639 + ... + 2984.

It is an arithmetic number, because the mean of its divisors is an integer number (244644).

2⁹⁷²⁷⁷⁹ is an apocalyptic number.

972779 is a deficient number, since it is larger than the sum of its proper divisors (5797).

972779 is a wasteful number, since it uses less digits than its factorization.

972779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5796.

The product of its digits is 55566, while the sum is 41.

The square root of 972779 is about 986.2955946368. The cubic root of 972779 is about 99.0842733771.

The spelling of 972779 in words is "nine hundred seventy-two thousand, seven hundred seventy-nine".