78973015 has 16 divisors (see below), whose sum is σ = 103967136. Its totient is φ = 57110400.

The previous prime is 78973001. The next prime is 78973031. The reversal of 78973015 is 51037987.

It is not a de Polignac number, because 78973015 - 2¹⁵ = 78940247 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 15 ways as a sum of consecutive naturals, for example, 5989 + ... + 13921.

It is an arithmetic number, because the mean of its divisors is an integer number (6497946).

Almost surely, 2^78973015 is an apocalyptic number.

78973015 is a deficient number, since it is larger than the sum of its proper divisors (24994121).

78973015 is a wasteful number, since it uses less digits than its factorization.

78973015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8130.

The product of its (nonzero) digits is 52920, while the sum is 40.

The square root of 78973015 is about 8886.6762628105. The cubic root of 78973015 is about 429.0351813038.

The spelling of 78973015 in words is "seventy-eight million, nine hundred seventy-three thousand, fifteen".