78994315 has 4 divisors (see below), whose sum is σ = 94793184. Its totient is φ = 63195448.

The previous prime is 78994303. The next prime is 78994339. The reversal of 78994315 is 51349987.

It is a happy number.

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 78994315 - 2⁵ = 78994283 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7899427 + ... + 7899436.

It is an arithmetic number, because the mean of its divisors is an integer number (23698296).

Almost surely, 2^78994315 is an apocalyptic number.

78994315 is a deficient number, since it is larger than the sum of its proper divisors (15798869).

78994315 is a wasteful number, since it uses less digits than its factorization.

78994315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15798868.

The product of its digits is 272160, while the sum is 46.

The square root of 78994315 is about 8887.8746053261. The cubic root of 78994315 is about 429.0737498701.

The spelling of 78994315 in words is "seventy-eight million, nine hundred ninety-four thousand, three hundred fifteen".