972955817 has 4 divisors (see below), whose sum is σ = 974987520. Its totient is φ = 970924116.

The previous prime is 972955807. The next prime is 972955831. The reversal of 972955817 is 718559279.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 718559279 = 9631 ⋅74609.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-972955817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (972955807) 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, 1015133 + ... + 1016090.

It is an arithmetic number, because the mean of its divisors is an integer number (243746880).

Almost surely, 2^972955817 is an apocalyptic number.

It is an amenable number.

972955817 is a deficient number, since it is larger than the sum of its proper divisors (2031703).

972955817 is a wasteful number, since it uses less digits than its factorization.

972955817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2031702.

The product of its digits is 1587600, while the sum is 53.

The square root of 972955817 is about 31192.2396919490. The cubic root of 972955817 is about 990.9027635845.

The spelling of 972955817 in words is "nine hundred seventy-two million, nine hundred fifty-five thousand, eight hundred seventeen".