78505367 has 4 divisors (see below), whose sum is σ = 78753336. Its totient is φ = 78257400.

The previous prime is 78505363. The next prime is 78505391. The reversal of 78505367 is 76350587.

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 78505367 - 2² = 78505363 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78505363) 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, 123509 + ... + 124142.

It is an arithmetic number, because the mean of its divisors is an integer number (19688334).

Almost surely, 2^78505367 is an apocalyptic number.

78505367 is a deficient number, since it is larger than the sum of its proper divisors (247969).

78505367 is a wasteful number, since it uses less digits than its factorization.

78505367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247968.

The product of its (nonzero) digits is 176400, while the sum is 41.

The square root of 78505367 is about 8860.3254454901. The cubic root of 78505367 is about 428.1866434193.

The spelling of 78505367 in words is "seventy-eight million, five hundred five thousand, three hundred sixty-seven".