78977087 has 16 divisors (see below), whose sum is σ = 96655680. Its totient is φ = 62988288.

The previous prime is 78977071. The next prime is 78977113. The reversal of 78977087 is 78077987.

It is a cyclic number.

It is not a de Polignac number, because 78977087 - 2⁴ = 78977071 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 (78977027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6863 + ... + 14319.

It is an arithmetic number, because the mean of its divisors is an integer number (6040980).

Almost surely, 2^78977087 is an apocalyptic number.

78977087 is a deficient number, since it is larger than the sum of its proper divisors (17678593).

78977087 is a wasteful number, since it uses less digits than its factorization.

78977087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7570.

The product of its (nonzero) digits is 1382976, while the sum is 53.

The square root of 78977087 is about 8886.9053668867. The cubic root of 78977087 is about 429.0425551358.

The spelling of 78977087 in words is "seventy-eight million, nine hundred seventy-seven thousand, eighty-seven".