68018399 has 8 divisors (see below), whose sum is σ = 68880000. Its totient is φ = 67162392.

The previous prime is 68018381. The next prime is 68018413. The reversal of 68018399 is 99381086.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68018399 - 2⁸ = 68018143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68018329) 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, 26432 + ... + 28890.

It is an arithmetic number, because the mean of its divisors is an integer number (8610000).

Almost surely, 2^68018399 is an apocalyptic number.

68018399 is a deficient number, since it is larger than the sum of its proper divisors (861601).

68018399 is a wasteful number, since it uses less digits than its factorization.

68018399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2797.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 68018399 is about 8247.3267790236. The cubic root of 68018399 is about 408.2023197996.

The spelling of 68018399 in words is "sixty-eight million, eighteen thousand, three hundred ninety-nine".