76878647 has 2 divisors, whose sum is σ = 76878648. Its totient is φ = 76878646.

The previous prime is 76878631. The next prime is 76878671. The reversal of 76878647 is 74687867.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 76878647 - 2⁴ = 76878631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76878677) 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 as a sum of consecutive naturals, namely, 38439323 + 38439324.

It is an arithmetic number, because the mean of its divisors is an integer number (38439324).

Almost surely, 2^76878647 is an apocalyptic number.

76878647 is a deficient number, since it is larger than the sum of its proper divisors (1).

76878647 is an equidigital number, since it uses as much as digits as its factorization.

76878647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3161088, while the sum is 53.

The square root of 76878647 is about 8768.0469318999. The cubic root of 76878647 is about 425.2084735002.

The spelling of 76878647 in words is "seventy-six million, eight hundred seventy-eight thousand, six hundred forty-seven".