68163889 has 8 divisors (see below), whose sum is σ = 68963328. Its totient is φ = 67369440.

The previous prime is 68163877. The next prime is 68163919. The reversal of 68163889 is 98836186.

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 68163889 - 2⁹ = 68163377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68163859) 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, 30829 + ... + 32965.

It is an arithmetic number, because the mean of its divisors is an integer number (8620416).

Almost surely, 2^68163889 is an apocalyptic number.

It is an amenable number.

68163889 is a deficient number, since it is larger than the sum of its proper divisors (799439).

68163889 is a wasteful number, since it uses less digits than its factorization.

68163889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2495.

The product of its digits is 497664, while the sum is 49.

The square root of 68163889 is about 8256.1425011927. The cubic root of 68163889 is about 408.4931580748.

The spelling of 68163889 in words is "sixty-eight million, one hundred sixty-three thousand, eight hundred eighty-nine".