68667939 has 8 divisors (see below), whose sum is σ = 101730320. Its totient is φ = 45778608.

The previous prime is 68667923. The next prime is 68667943. The reversal of 68667939 is 93976686.

It is a happy number.

It is not a de Polignac number, because 68667939 - 2⁴ = 68667923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68667979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1271602 + ... + 1271655.

It is an arithmetic number, because the mean of its divisors is an integer number (12716290).

Almost surely, 2^68667939 is an apocalyptic number.

68667939 is a deficient number, since it is larger than the sum of its proper divisors (33062381).

68667939 is a wasteful number, since it uses less digits than its factorization.

68667939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2543266 (or 2543260 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 54.

The square root of 68667939 is about 8286.6120338773. The cubic root of 68667939 is about 409.4975781096.

The spelling of 68667939 in words is "sixty-eight million, six hundred sixty-seven thousand, nine hundred thirty-nine".