78968215 has 4 divisors (see below), whose sum is σ = 94761864. Its totient is φ = 63174568.

The previous prime is 78968207. The next prime is 78968231. The reversal of 78968215 is 51286987.

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 78968215 - 2³ = 78968207 is a prime.

It is a Duffinian number.

It is a congruent 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, 7896817 + ... + 7896826.

It is an arithmetic number, because the mean of its divisors is an integer number (23690466).

Almost surely, 2^78968215 is an apocalyptic number.

78968215 is a deficient number, since it is larger than the sum of its proper divisors (15793649).

78968215 is a wasteful number, since it uses less digits than its factorization.

78968215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15793648.

The product of its digits is 241920, while the sum is 46.

The square root of 78968215 is about 8886.4061914815. The cubic root of 78968215 is about 429.0264888384.

The spelling of 78968215 in words is "seventy-eight million, nine hundred sixty-eight thousand, two hundred fifteen".