77930827 has 4 divisors (see below), whose sum is σ = 83925520. Its totient is φ = 71936136.

The previous prime is 77930821. The next prime is 77930833. The reversal of 77930827 is 72803977.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72803977 = 107 ⋅680411.

It is an interprime number because it is at equal distance from previous prime (77930821) and next prime (77930833).

It is a cyclic number.

It is not a de Polignac number, because 77930827 - 2³ = 77930819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77930821) 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, 2997327 + ... + 2997352.

It is an arithmetic number, because the mean of its divisors is an integer number (20981380).

Almost surely, 2^77930827 is an apocalyptic number.

77930827 is a deficient number, since it is larger than the sum of its proper divisors (5994693).

77930827 is a wasteful number, since it uses less digits than its factorization.

77930827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5994692.

The product of its (nonzero) digits is 148176, while the sum is 43.

The square root of 77930827 is about 8827.8438477354. The cubic root of 77930827 is about 427.1395262763.

The spelling of 77930827 in words is "seventy-seven million, nine hundred thirty thousand, eight hundred twenty-seven".