971152491 has 16 divisors (see below), whose sum is σ = 1364816000. Its totient is φ = 612551808.

The previous prime is 971152487. The next prime is 971152499. The reversal of 971152491 is 194251179.

It is not a de Polignac number, because 971152491 - 2² = 971152487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (971152499) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 34035 + ... + 55683.

It is an arithmetic number, because the mean of its divisors is an integer number (85301000).

Almost surely, 2^971152491 is an apocalyptic number.

971152491 is a deficient number, since it is larger than the sum of its proper divisors (393663509).

971152491 is a wasteful number, since it uses less digits than its factorization.

971152491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22458.

The product of its digits is 22680, while the sum is 39.

The square root of 971152491 is about 31163.3196402437. The cubic root of 971152491 is about 990.2901883733.

The spelling of 971152491 in words is "nine hundred seventy-one million, one hundred fifty-two thousand, four hundred ninety-one".