971967915 has 48 divisors (see below), whose sum is σ = 1783473120. Its totient is φ = 488839680.

The previous prime is 971967907. The next prime is 971967959. The reversal of 971967915 is 519769179.

It is a happy number.

It is not a de Polignac number, because 971967915 - 2³ = 971967907 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 47455 + ... + 64775.

It is an arithmetic number, because the mean of its divisors is an integer number (37155690).

Almost surely, 2^971967915 is an apocalyptic number.

971967915 is a deficient number, since it is larger than the sum of its proper divisors (811505205).

971967915 is a wasteful number, since it uses less digits than its factorization.

971967915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17404 (or 17401 counting only the distinct ones).

The product of its digits is 1071630, while the sum is 54.

The square root of 971967915 is about 31176.3999685660. The cubic root of 971967915 is about 990.5672751312.

It can be divided in two parts, 97196 and 7915, that added together give a triangular number (105111 = T₄₅₈).

The spelling of 971967915 in words is "nine hundred seventy-one million, nine hundred sixty-seven thousand, nine hundred fifteen".