68911689 has 48 divisors (see below), whose sum is σ = 122791680. Its totient is φ = 33899040.

The previous prime is 68911681. The next prime is 68911697. The reversal of 68911689 is 98611986.

It is an interprime number because it is at equal distance from previous prime (68911681) and next prime (68911697).

It is not a de Polignac number, because 68911689 - 2³ = 68911681 is a prime.

68911689 is a strobogrammatic number because it is the same when read upside-down.

It is not an unprimeable number, because it can be changed into a prime (68911681) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 29602 + ... + 31844.

It is an arithmetic number, because the mean of its divisors is an integer number (2558160).

Almost surely, 2^68911689 is an apocalyptic number.

It is an amenable number.

68911689 is a deficient number, since it is larger than the sum of its proper divisors (53879991).

68911689 is a wasteful number, since it uses less digits than its factorization.

68911689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2290 (or 2283 counting only the distinct ones).

The product of its digits is 186624, while the sum is 48.

The square root of 68911689 is about 8301.3064634430. The cubic root of 68911689 is about 409.9815359522.

The spelling of 68911689 in words is "sixty-eight million, nine hundred eleven thousand, six hundred eighty-nine".