77461687 has 16 divisors (see below), whose sum is σ = 81326592. Its totient is φ = 73725120.

The previous prime is 77461679. The next prime is 77461691. The reversal of 77461687 is 78616477.

It is a cyclic number.

It is not a de Polignac number, because 77461687 - 2³ = 77461679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77461607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 367012 + ... + 367222.

It is an arithmetic number, because the mean of its divisors is an integer number (5082912).

Almost surely, 2^77461687 is an apocalyptic number.

77461687 is a deficient number, since it is larger than the sum of its proper divisors (3864905).

77461687 is a wasteful number, since it uses less digits than its factorization.

77461687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438.

The product of its digits is 395136, while the sum is 46.

The square root of 77461687 is about 8801.2321296509. The cubic root of 77461687 is about 426.2806804483.

The spelling of 77461687 in words is "seventy-seven million, four hundred sixty-one thousand, six hundred eighty-seven".