977657149 has 16 divisors (see below), whose sum is σ = 1135261440. Its totient is φ = 824584320.

The previous prime is 977657117. The next prime is 977657183. The reversal of 977657149 is 941756779.

It is not a de Polignac number, because 977657149 - 2⁵ = 977657117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 977657149.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (977657449) 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, 303057 + ... + 306265.

It is an arithmetic number, because the mean of its divisors is an integer number (70953840).

Almost surely, 2^977657149 is an apocalyptic number.

It is an amenable number.

977657149 is a deficient number, since it is larger than the sum of its proper divisors (157604291).

977657149 is a wasteful number, since it uses less digits than its factorization.

977657149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3900.

The product of its digits is 3333960, while the sum is 55.

The square root of 977657149 is about 31267.5094786905. The cubic root of 977657149 is about 992.4962170798.

The spelling of 977657149 in words is "nine hundred seventy-seven million, six hundred fifty-seven thousand, one hundred forty-nine".