78715099 has 4 divisors (see below), whose sum is σ = 78800760. Its totient is φ = 78629440.

The previous prime is 78715037. The next prime is 78715103. The reversal of 78715099 is 99051787.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78715099 - 2¹¹ = 78713051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78715199) 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 in 3 ways as a sum of consecutive naturals, for example, 41437 + ... + 43294.

It is an arithmetic number, because the mean of its divisors is an integer number (19700190).

Almost surely, 2^78715099 is an apocalyptic number.

78715099 is a deficient number, since it is larger than the sum of its proper divisors (85661).

78715099 is an equidigital number, since it uses as much as digits as its factorization.

78715099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85660.

The product of its (nonzero) digits is 158760, while the sum is 46.

The square root of 78715099 is about 8872.1530081486. The cubic root of 78715099 is about 428.5676134951.

The spelling of 78715099 in words is "seventy-eight million, seven hundred fifteen thousand, ninety-nine".