68989 has 4 divisors (see below), whose sum is σ = 72640. Its totient is φ = 65340.

The previous prime is 68963. The next prime is 68993. The reversal of 68989 is 98986.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 68989 - 2⁹ = 68477 is a prime.

It is a Duffinian number.

68989 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68909) 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, 1797 + ... + 1834.

It is an arithmetic number, because the mean of its divisors is an integer number (18160).

2⁶⁸⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

68989 is a deficient number, since it is larger than the sum of its proper divisors (3651).

68989 is a wasteful number, since it uses less digits than its factorization.

68989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3650.

The product of its digits is 31104, while the sum is 40.

The square root of 68989 is about 262.6575717546. The cubic root of 68989 is about 41.0134796051.

The spelling of 68989 in words is "sixty-eight thousand, nine hundred eighty-nine".