77897608 has 8 divisors (see below), whose sum is σ = 146058030. Its totient is φ = 38948800.

The previous prime is 77897597. The next prime is 77897629. The reversal of 77897608 is 80679877.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 77404804 + 492804 = 8798^2 + 702^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4868593 + ... + 4868608.

Almost surely, 2^77897608 is an apocalyptic number.

It is an amenable number.

77897608 is a deficient number, since it is larger than the sum of its proper divisors (68160422).

77897608 is a wasteful number, since it uses less digits than its factorization.

77897608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9737207 (or 9737203 counting only the distinct ones).

The product of its (nonzero) digits is 1185408, while the sum is 52.

The square root of 77897608 is about 8825.9621571815. The cubic root of 77897608 is about 427.0788264436.

The spelling of 77897608 in words is "seventy-seven million, eight hundred ninety-seven thousand, six hundred eight".