77687012 has 12 divisors (see below), whose sum is σ = 146410236. Its totient is φ = 35855520.

The previous prime is 77687003. The next prime is 77687017. The reversal of 77687012 is 21078677.

It can be written as a sum of positive squares in 2 ways, for example, as 13942756 + 63744256 = 3734^2 + 7984^2 .

It is not an unprimeable number, because it can be changed into a prime (77687017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 746939 + ... + 747042.

It is an arithmetic number, because the mean of its divisors is an integer number (12200853).

Almost surely, 2^77687012 is an apocalyptic number.

It is an amenable number.

77687012 is a deficient number, since it is larger than the sum of its proper divisors (68723224).

77687012 is a wasteful number, since it uses less digits than its factorization.

77687012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1493998 (or 1493996 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 38.

The square root of 77687012 is about 8814.0235987885. The cubic root of 77687012 is about 426.6936102234.

The spelling of 77687012 in words is "seventy-seven million, six hundred eighty-seven thousand, twelve".