77461117 has 4 divisors (see below), whose sum is σ = 80132220. Its totient is φ = 74790016.

The previous prime is 77461067. The next prime is 77461121. The reversal of 77461117 is 71116477.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29311396 + 48149721 = 5414^2 + 6939^2 .

It is a cyclic number.

It is not a de Polignac number, because 77461117 - 2⁷ = 77460989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77461187) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1335508 + ... + 1335565.

It is an arithmetic number, because the mean of its divisors is an integer number (20033055).

Almost surely, 2^77461117 is an apocalyptic number.

It is an amenable number.

77461117 is a deficient number, since it is larger than the sum of its proper divisors (2671103).

77461117 is a wasteful number, since it uses less digits than its factorization.

77461117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2671102.

The product of its digits is 8232, while the sum is 34.

The square root of 77461117 is about 8801.1997477617. The cubic root of 77461117 is about 426.2796348536.

The spelling of 77461117 in words is "seventy-seven million, four hundred sixty-one thousand, one hundred seventeen".