971995915 has 8 divisors (see below), whose sum is σ = 1272431088. Its totient is φ = 706906080.

The previous prime is 971995891. The next prime is 971995933. The reversal of 971995915 is 519599179.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 971995915 - 2⁹ = 971995403 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55), and also a Moran number because the ratio is a prime number: 17672653 = 971995915 / (9 + 7 + 1 + 9 + 9 + 5 + 9 + 1 + 5).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8836272 + ... + 8836381.

It is an arithmetic number, because the mean of its divisors is an integer number (159053886).

Almost surely, 2^971995915 is an apocalyptic number.

971995915 is a deficient number, since it is larger than the sum of its proper divisors (300435173).

971995915 is a wasteful number, since it uses less digits than its factorization.

971995915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17672669.

The product of its digits is 1148175, while the sum is 55.

The square root of 971995915 is about 31176.8490229529. The cubic root of 971995915 is about 990.5767869738.

The spelling of 971995915 in words is "nine hundred seventy-one million, nine hundred ninety-five thousand, nine hundred fifteen".