971427591 has 6 divisors (see below), whose sum is σ = 1403173200. Its totient is φ = 647618388.

The previous prime is 971427581. The next prime is 971427593. The reversal of 971427591 is 195724179.

It is not a de Polignac number, because 971427591 - 2⁵ = 971427559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (971427593) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53968191 + ... + 53968208.

It is an arithmetic number, because the mean of its divisors is an integer number (233862200).

Almost surely, 2^971427591 is an apocalyptic number.

971427591 is a deficient number, since it is larger than the sum of its proper divisors (431745609).

971427591 is a wasteful number, since it uses less digits than its factorization.

971427591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107936405 (or 107936402 counting only the distinct ones).

The product of its digits is 158760, while the sum is 45.

The square root of 971427591 is about 31167.7331707008. The cubic root of 971427591 is about 990.3836866013.

The spelling of 971427591 in words is "nine hundred seventy-one million, four hundred twenty-seven thousand, five hundred ninety-one".