78068517 has 4 divisors (see below), whose sum is σ = 104091360. Its totient is φ = 52045676.

The previous prime is 78068479. The next prime is 78068519. The reversal of 78068517 is 71586087.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 78068517 - 2⁶ = 78068453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78068519) 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, 13011417 + ... + 13011422.

It is an arithmetic number, because the mean of its divisors is an integer number (26022840).

Almost surely, 2^78068517 is an apocalyptic number.

It is an amenable number.

78068517 is a deficient number, since it is larger than the sum of its proper divisors (26022843).

78068517 is a wasteful number, since it uses less digits than its factorization.

78068517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26022842.

The product of its (nonzero) digits is 94080, while the sum is 42.

The square root of 78068517 is about 8835.6390261260. The cubic root of 78068517 is about 427.3909382883.

The spelling of 78068517 in words is "seventy-eight million, sixty-eight thousand, five hundred seventeen".