977981577 has 8 divisors (see below), whose sum is σ = 1307165280. Its totient is φ = 650392800.

The previous prime is 977981519. The next prime is 977981579. The reversal of 977981577 is 775189779.

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

It is not a de Polignac number, because 977981577 - 2⁷ = 977981449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 977981577.

It is not an unprimeable number, because it can be changed into a prime (977981579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 397299 + ... + 399752.

It is an arithmetic number, because the mean of its divisors is an integer number (163395660).

Almost surely, 2^977981577 is an apocalyptic number.

It is an amenable number.

977981577 is a deficient number, since it is larger than the sum of its proper divisors (329183703).

977981577 is a wasteful number, since it uses less digits than its factorization.

977981577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797463.

The product of its digits is 7779240, while the sum is 60.

The square root of 977981577 is about 31272.6969895466. The cubic root of 977981577 is about 992.6059890152.

The spelling of 977981577 in words is "nine hundred seventy-seven million, nine hundred eighty-one thousand, five hundred seventy-seven".