971791015 has 16 divisors (see below), whose sum is σ = 1299160800. Its totient is φ = 692883072.

The previous prime is 971790983. The next prime is 971791021. The reversal of 971791015 is 510197179.

It is a cyclic number.

It is not a de Polignac number, because 971791015 - 2⁵ = 971790983 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 255885 + ... + 259654.

It is an arithmetic number, because the mean of its divisors is an integer number (81197550).

Almost surely, 2^971791015 is an apocalyptic number.

971791015 is a deficient number, since it is larger than the sum of its proper divisors (327369785).

971791015 is a wasteful number, since it uses less digits than its factorization.

971791015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515586.

The product of its (nonzero) digits is 19845, while the sum is 40.

The square root of 971791015 is about 31173.5627575675. The cubic root of 971791015 is about 990.5071764454.

The spelling of 971791015 in words is "nine hundred seventy-one million, seven hundred ninety-one thousand, fifteen".