68715393 has 4 divisors (see below), whose sum is σ = 91620528. Its totient is φ = 45810260.

The previous prime is 68715391. The next prime is 68715403. The reversal of 68715393 is 39351786.

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 68715393 - 2¹ = 68715391 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68715391) 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, 11452563 + ... + 11452568.

It is an arithmetic number, because the mean of its divisors is an integer number (22905132).

Almost surely, 2^68715393 is an apocalyptic number.

It is an amenable number.

68715393 is a deficient number, since it is larger than the sum of its proper divisors (22905135).

68715393 is a wasteful number, since it uses less digits than its factorization.

68715393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22905134.

The product of its digits is 136080, while the sum is 42.

The square root of 68715393 is about 8289.4748325814. The cubic root of 68715393 is about 409.5918861848.

The spelling of 68715393 in words is "sixty-eight million, seven hundred fifteen thousand, three hundred ninety-three".