68715939 has 4 divisors (see below), whose sum is σ = 91621256. Its totient is φ = 45810624.

The previous prime is 68715923. The next prime is 68715953. The reversal of 68715939 is 93951786.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 68715939 - 2⁴ = 68715923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68705939) 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, 11452654 + ... + 11452659.

It is an arithmetic number, because the mean of its divisors is an integer number (22905314).

Almost surely, 2^68715939 is an apocalyptic number.

68715939 is a deficient number, since it is larger than the sum of its proper divisors (22905317).

68715939 is a wasteful number, since it uses less digits than its factorization.

68715939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22905316.

The product of its digits is 408240, while the sum is 48.

The square root of 68715939 is about 8289.5077658447. The cubic root of 68715939 is about 409.5929710295.

The spelling of 68715939 in words is "sixty-eight million, seven hundred fifteen thousand, nine hundred thirty-nine".