68657889 has 4 divisors (see below), whose sum is σ = 91543856. Its totient is φ = 45771924.

The previous prime is 68657867. The next prime is 68657933. The reversal of 68657889 is 98875686.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 68657889 - 2⁹ = 68657377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68657389) 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, 11442979 + ... + 11442984.

It is an arithmetic number, because the mean of its divisors is an integer number (22885964).

Almost surely, 2^68657889 is an apocalyptic number.

It is an amenable number.

68657889 is a deficient number, since it is larger than the sum of its proper divisors (22885967).

68657889 is a wasteful number, since it uses less digits than its factorization.

68657889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22885966.

The product of its digits is 5806080, while the sum is 57.

The square root of 68657889 is about 8286.0056118736. The cubic root of 68657889 is about 409.4775995893.

The spelling of 68657889 in words is "sixty-eight million, six hundred fifty-seven thousand, eight hundred eighty-nine".