972716687 has 4 divisors (see below), whose sum is σ = 972789216. Its totient is φ = 972644160.

The previous prime is 972716683. The next prime is 972716707. The reversal of 972716687 is 786617279.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 786617279 = 7 ⋅112373897.

It is a cyclic number.

It is not a de Polignac number, because 972716687 - 2² = 972716683 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (972716683) 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, 9623 + ... + 45144.

It is an arithmetic number, because the mean of its divisors is an integer number (243197304).

Almost surely, 2^972716687 is an apocalyptic number.

972716687 is a deficient number, since it is larger than the sum of its proper divisors (72529).

972716687 is a wasteful number, since it uses less digits than its factorization.

972716687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72528.

The product of its digits is 1778112, while the sum is 53.

The square root of 972716687 is about 31188.4062914411. The cubic root of 972716687 is about 990.8215766183.

The spelling of 972716687 in words is "nine hundred seventy-two million, seven hundred sixteen thousand, six hundred eighty-seven".