78678099 has 6 divisors (see below), whose sum is σ = 113646156. Its totient is φ = 52452060.

The previous prime is 78678079. The next prime is 78678133. The reversal of 78678099 is 99087687.

It is not a de Polignac number, because 78678099 - 2⁷ = 78677971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78678029) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4370997 + ... + 4371014.

It is an arithmetic number, because the mean of its divisors is an integer number (18941026).

Almost surely, 2^78678099 is an apocalyptic number.

78678099 is a deficient number, since it is larger than the sum of its proper divisors (34968057).

78678099 is a wasteful number, since it uses less digits than its factorization.

78678099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8742017 (or 8742014 counting only the distinct ones).

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

The square root of 78678099 is about 8870.0675871157. The cubic root of 78678099 is about 428.5004536276.

The spelling of 78678099 in words is "seventy-eight million, six hundred seventy-eight thousand, ninety-nine".