77134885 has 16 divisors (see below), whose sum is σ = 94204656. Its totient is φ = 60622848.

The previous prime is 77134879. The next prime is 77134891. The reversal of 77134885 is 58843177.

It is an interprime number because it is at equal distance from previous prime (77134879) and next prime (77134891).

It can be written as a sum of positive squares in 8 ways, for example, as 22714756 + 54420129 = 4766^2 + 7377^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77134885 is a prime.

It is a Duffinian number.

It is a congruent number.

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 in 15 ways as a sum of consecutive naturals, for example, 75639 + ... + 76651.

It is an arithmetic number, because the mean of its divisors is an integer number (5887791).

Almost surely, 2^77134885 is an apocalyptic number.

It is an amenable number.

77134885 is a deficient number, since it is larger than the sum of its proper divisors (17069771).

77134885 is a wasteful number, since it uses less digits than its factorization.

77134885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1272.

The product of its digits is 188160, while the sum is 43.

The square root of 77134885 is about 8782.6468106147. The cubic root of 77134885 is about 425.6803589435.

The spelling of 77134885 in words is "seventy-seven million, one hundred thirty-four thousand, eight hundred eighty-five".