971172556 has 12 divisors (see below), whose sum is σ = 1712935168. Its totient is φ = 481762512.

The previous prime is 971172533. The next prime is 971172581. The reversal of 971172556 is 655271179.

It is a super-2 number, since 2×971172556² = 1886352267055146272, which contains 22 as substring.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 955371 + ... + 956386.

Almost surely, 2^971172556 is an apocalyptic number.

It is an amenable number.

971172556 is a deficient number, since it is larger than the sum of its proper divisors (741762612).

971172556 is a wasteful number, since it uses less digits than its factorization.

971172556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1911888 (or 1911886 counting only the distinct ones).

The product of its digits is 132300, while the sum is 43.

The square root of 971172556 is about 31163.6415715494. The cubic root of 971172556 is about 990.2970084611.

The spelling of 971172556 in words is "nine hundred seventy-one million, one hundred seventy-two thousand, five hundred fifty-six".