68864239 has 2 divisors, whose sum is σ = 68864240. Its totient is φ = 68864238.

The previous prime is 68864209. The next prime is 68864261. The reversal of 68864239 is 93246886.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68864239 - 2⁷ = 68864111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68864209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34432119 + 34432120.

It is an arithmetic number, because the mean of its divisors is an integer number (34432120).

Almost surely, 2^68864239 is an apocalyptic number.

68864239 is a deficient number, since it is larger than the sum of its proper divisors (1).

68864239 is an equidigital number, since it uses as much as digits as its factorization.

68864239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 497664, while the sum is 46.

The square root of 68864239 is about 8298.4479874251. The cubic root of 68864239 is about 409.8874150520.

The spelling of 68864239 in words is "sixty-eight million, eight hundred sixty-four thousand, two hundred thirty-nine".