78967415 has 4 divisors (see below), whose sum is σ = 94760904. Its totient is φ = 63173928.

The previous prime is 78967411. The next prime is 78967417. The reversal of 78967415 is 51476987.

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 78967415 - 2² = 78967411 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78967415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78967411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7896737 + ... + 7896746.

It is an arithmetic number, because the mean of its divisors is an integer number (23690226).

Almost surely, 2^78967415 is an apocalyptic number.

78967415 is a deficient number, since it is larger than the sum of its proper divisors (15793489).

78967415 is a wasteful number, since it uses less digits than its factorization.

78967415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15793488.

The product of its digits is 423360, while the sum is 47.

The square root of 78967415 is about 8886.3611787953. The cubic root of 78967415 is about 429.0250400600.

The spelling of 78967415 in words is "seventy-eight million, nine hundred sixty-seven thousand, four hundred fifteen".