68715715 has 4 divisors (see below), whose sum is σ = 82458864. Its totient is φ = 54972568.

The previous prime is 68715679. The next prime is 68715727. The reversal of 68715715 is 51751786.

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 68715715 - 2⁹ = 68715203 is a prime.

It is a super-2 number, since 2×68715715² = 9443698975922450, which contains 22 as substring.

It is a Duffinian 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, 6871567 + ... + 6871576.

It is an arithmetic number, because the mean of its divisors is an integer number (20614716).

Almost surely, 2^68715715 is an apocalyptic number.

68715715 is a deficient number, since it is larger than the sum of its proper divisors (13743149).

68715715 is a wasteful number, since it uses less digits than its factorization.

68715715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13743148.

The product of its digits is 58800, while the sum is 40.

The square root of 68715715 is about 8289.4942547782. The cubic root of 68715715 is about 409.5925259657.

The spelling of 68715715 in words is "sixty-eight million, seven hundred fifteen thousand, seven hundred fifteen".