972821958 has 32 divisors (see below), whose sum is σ = 1988789760. Its totient is φ = 317160480.

The previous prime is 972821951. The next prime is 972821959. The reversal of 972821958 is 859128279.

It is a self number, because there is not a number n which added to its sum of digits gives 972821958.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (972821951) 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 15 ways as a sum of consecutive naturals, for example, 41128 + ... + 60308.

It is an arithmetic number, because the mean of its divisors is an integer number (62149680).

Almost surely, 2^972821958 is an apocalyptic number.

972821958 is an abundant number, since it is smaller than the sum of its proper divisors (1015967802).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

972821958 is a wasteful number, since it uses less digits than its factorization.

972821958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19372.

The product of its digits is 725760, while the sum is 51.

The square root of 972821958 is about 31190.0939081626. The cubic root of 972821958 is about 990.8573187883.

The spelling of 972821958 in words is "nine hundred seventy-two million, eight hundred twenty-one thousand, nine hundred fifty-eight".