972577091 has 4 divisors (see below), whose sum is σ = 972950784. Its totient is φ = 972203400.

The previous prime is 972577061. The next prime is 972577093. The reversal of 972577091 is 190775279.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190775279 = 149 ⋅1280371.

It is a cyclic number.

It is not a de Polignac number, because 972577091 - 2⁶ = 972577027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (972577093) 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, 182915 + ... + 188156.

It is an arithmetic number, because the mean of its divisors is an integer number (243237696).

Almost surely, 2^972577091 is an apocalyptic number.

972577091 is a deficient number, since it is larger than the sum of its proper divisors (373693).

972577091 is a wasteful number, since it uses less digits than its factorization.

972577091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373692.

The product of its (nonzero) digits is 277830, while the sum is 47.

The square root of 972577091 is about 31186.1682641520. The cubic root of 972577091 is about 990.7741762643.

The spelling of 972577091 in words is "nine hundred seventy-two million, five hundred seventy-seven thousand, ninety-one".