972977831827 has 4 divisors (see below), whose sum is σ = 972996130656. Its totient is φ = 972959533000.

The previous prime is 972977831803. The next prime is 972977831857. The reversal of 972977831827 is 728138779279.

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 972977831827 - 2⁷ = 972977831699 is a prime.

It is a super-3 number, since 3×972977831827³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (972977831857) 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, 9069424 + ... + 9176077.

It is an arithmetic number, because the mean of its divisors is an integer number (243249032664).

Almost surely, 2^972977831827 is an apocalyptic number.

972977831827 is a deficient number, since it is larger than the sum of its proper divisors (18298829).

972977831827 is a wasteful number, since it uses less digits than its factorization.

972977831827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18298828.

The product of its digits is 149361408, while the sum is 70.

The spelling of 972977831827 in words is "nine hundred seventy-two billion, nine hundred seventy-seven million, eight hundred thirty-one thousand, eight hundred twenty-seven".