977117491 has 8 divisors (see below), whose sum is σ = 1116910080. Its totient is φ = 837376008.

The previous prime is 977117461. The next prime is 977117513. The reversal of 977117491 is 194711779.

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

It is not a de Polignac number, because 977117491 - 2¹⁵ = 977084723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (977117461) 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, 46620 + ... + 64246.

It is an arithmetic number, because the mean of its divisors is an integer number (139613760).

Almost surely, 2^977117491 is an apocalyptic number.

977117491 is a deficient number, since it is larger than the sum of its proper divisors (139792589).

977117491 is a wasteful number, since it uses less digits than its factorization.

977117491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25553.

The product of its digits is 111132, while the sum is 46.

The square root of 977117491 is about 31258.8785947289. The cubic root of 977117491 is about 992.3135671243.

The spelling of 977117491 in words is "nine hundred seventy-seven million, one hundred seventeen thousand, four hundred ninety-one".