972442687 has 4 divisors (see below), whose sum is σ = 1029645216. Its totient is φ = 915240160.

The previous prime is 972442657. The next prime is 972442697. The reversal of 972442687 is 786244279.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-972442687 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 972442687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (972442637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28601239 + ... + 28601272.

It is an arithmetic number, because the mean of its divisors is an integer number (257411304).

Almost surely, 2^972442687 is an apocalyptic number.

972442687 is a deficient number, since it is larger than the sum of its proper divisors (57202529).

972442687 is a wasteful number, since it uses less digits than its factorization.

972442687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57202528.

The product of its digits is 1354752, while the sum is 49.

The square root of 972442687 is about 31184.0133241377. The cubic root of 972442687 is about 990.7285345877.

The spelling of 972442687 in words is "nine hundred seventy-two million, four hundred forty-two thousand, six hundred eighty-seven".