77683867 has 4 divisors (see below), whose sum is σ = 77732136. Its totient is φ = 77635600.

The previous prime is 77683817. The next prime is 77683873. The reversal of 77683867 is 76838677.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77683867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77683817) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 21634 + ... + 24967.

It is an arithmetic number, because the mean of its divisors is an integer number (19433034).

Almost surely, 2^77683867 is an apocalyptic number.

77683867 is a deficient number, since it is larger than the sum of its proper divisors (48269).

77683867 is a wasteful number, since it uses less digits than its factorization.

77683867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48268.

The product of its digits is 2370816, while the sum is 52.

The square root of 77683867 is about 8813.8451881117. The cubic root of 77683867 is about 426.6878522060.

The spelling of 77683867 in words is "seventy-seven million, six hundred eighty-three thousand, eight hundred sixty-seven".