972773885 has 4 divisors (see below), whose sum is σ = 1167328668. Its totient is φ = 778219104.

The previous prime is 972773869. The next prime is 972773927. The reversal of 972773885 is 588377279.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 588377279 = 7 ⋅84053897.

It can be written as a sum of positive squares in 2 ways, for example, as 354455929 + 618317956 = 18827^2 + 24866^2 .

It is a cyclic number.

It is not a de Polignac number, because 972773885 - 2⁴ = 972773869 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 972773885.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97277384 + ... + 97277393.

It is an arithmetic number, because the mean of its divisors is an integer number (291832167).

Almost surely, 2^972773885 is an apocalyptic number.

It is an amenable number.

972773885 is a deficient number, since it is larger than the sum of its proper divisors (194554783).

972773885 is a wasteful number, since it uses less digits than its factorization.

972773885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194554782.

The product of its digits is 5927040, while the sum is 56.

The square root of 972773885 is about 31189.3232533186. The cubic root of 972773885 is about 990.8409971075.

The spelling of 972773885 in words is "nine hundred seventy-two million, seven hundred seventy-three thousand, eight hundred eighty-five".