977700217 has 16 divisors (see below), whose sum is σ = 1061277840. Its totient is φ = 895352832.

The previous prime is 977700211. The next prime is 977700221. The reversal of 977700217 is 712007779.

977700217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 15397776 + 962302441 = 3924^2 + 31021^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-977700217 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 977700217.

It is not an unprimeable number, because it can be changed into a prime (977700211) 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, 1178959 + ... + 1179787.

It is an arithmetic number, because the mean of its divisors is an integer number (66329865).

Almost surely, 2^977700217 is an apocalyptic number.

It is an amenable number.

977700217 is a deficient number, since it is larger than the sum of its proper divisors (83577623).

977700217 is a wasteful number, since it uses less digits than its factorization.

977700217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1452.

The product of its (nonzero) digits is 43218, while the sum is 40.

The square root of 977700217 is about 31268.1981732239. The cubic root of 977700217 is about 992.5107907639.

The spelling of 977700217 in words is "nine hundred seventy-seven million, seven hundred thousand, two hundred seventeen".