78706899 has 24 divisors (see below), whose sum is σ = 120360240. Its totient is φ = 49476672.

The previous prime is 78706847. The next prime is 78706907. The reversal of 78706899 is 99860787.

It is a de Polignac number, because none of the positive numbers 2^k-78706899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78706099) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7717 + ... + 14729.

It is an arithmetic number, because the mean of its divisors is an integer number (5015010).

Almost surely, 2^78706899 is an apocalyptic number.

78706899 is a deficient number, since it is larger than the sum of its proper divisors (41653341).

78706899 is a wasteful number, since it uses less digits than its factorization.

78706899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7091 (or 7088 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 54.

The square root of 78706899 is about 8871.6908760394. The cubic root of 78706899 is about 428.5527312319.

The spelling of 78706899 in words is "seventy-eight million, seven hundred six thousand, eight hundred ninety-nine".