974161491 has 8 divisors (see below), whose sum is σ = 1311021504. Its totient is φ = 643371240.

The previous prime is 974161471. The next prime is 974161541. The reversal of 974161491 is 194161479.

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

It is not a de Polignac number, because 974161491 - 2¹⁸ = 973899347 is a prime.

It is a super-2 number, since 2×974161491² = 1897981221094686162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (974161471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1517065 + ... + 1517706.

It is an arithmetic number, because the mean of its divisors is an integer number (163877688).

Almost surely, 2^974161491 is an apocalyptic number.

974161491 is a deficient number, since it is larger than the sum of its proper divisors (336860013).

974161491 is a wasteful number, since it uses less digits than its factorization.

974161491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3034881.

The product of its digits is 54432, while the sum is 42.

The square root of 974161491 is about 31211.5602141258. The cubic root of 974161491 is about 991.3118991723.

The spelling of 974161491 in words is "nine hundred seventy-four million, one hundred sixty-one thousand, four hundred ninety-one".