981117577 has 16 divisors (see below), whose sum is σ = 1108779840. Its totient is φ = 860358400.

The previous prime is 981117551. The next prime is 981117581. The reversal of 981117577 is 775711189.

It is a happy number.

It is not a de Polignac number, because 981117577 - 2¹¹ = 981115529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (981117587) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27918 + ... + 52360.

It is an arithmetic number, because the mean of its divisors is an integer number (69298740).

Almost surely, 2^981117577 is an apocalyptic number.

It is an amenable number.

981117577 is a deficient number, since it is larger than the sum of its proper divisors (127662263).

981117577 is a wasteful number, since it uses less digits than its factorization.

981117577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24584.

The product of its digits is 123480, while the sum is 46.

The square root of 981117577 is about 31322.7964428465. The cubic root of 981117577 is about 993.6658219007.

The spelling of 981117577 in words is "nine hundred eighty-one million, one hundred seventeen thousand, five hundred seventy-seven".