77913896 has 8 divisors (see below), whose sum is σ = 146088570. Its totient is φ = 38956944.

The previous prime is 77913853. The next prime is 77913911. The reversal of 77913896 is 69831977.

It can be written as a sum of positive squares in only one way, i.e., 73444900 + 4468996 = 8570^2 + 2114^2 .

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

It is an unprimeable number.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4869611 + ... + 4869626.

Almost surely, 2^77913896 is an apocalyptic number.

It is an amenable number.

77913896 is a deficient number, since it is larger than the sum of its proper divisors (68174674).

77913896 is a wasteful number, since it uses less digits than its factorization.

77913896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9739243 (or 9739239 counting only the distinct ones).

The product of its digits is 571536, while the sum is 50.

The square root of 77913896 is about 8826.8848412110. The cubic root of 77913896 is about 427.1085910509.

It can be divided in two parts, 7791 and 3896, that multiplied together give a triangular number (30353736 = T₇₇₉₁).

The spelling of 77913896 in words is "seventy-seven million, nine hundred thirteen thousand, eight hundred ninety-six".