68889189 has 4 divisors (see below), whose sum is σ = 91852256. Its totient is φ = 45926124.

The previous prime is 68889187. The next prime is 68889211. The reversal of 68889189 is 98198886.

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 68889189 - 2¹ = 68889187 is a prime.

It is a super-2 number, since 2×68889189² = 9491440722155442, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68889187) 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, 11481529 + ... + 11481534.

It is an arithmetic number, because the mean of its divisors is an integer number (22963064).

Almost surely, 2^68889189 is an apocalyptic number.

It is an amenable number.

68889189 is a deficient number, since it is larger than the sum of its proper divisors (22963067).

68889189 is a wasteful number, since it uses less digits than its factorization.

68889189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22963066.

The product of its digits is 1990656, while the sum is 57.

The square root of 68889189 is about 8299.9511444345. The cubic root of 68889189 is about 409.9369107764.

The spelling of 68889189 in words is "sixty-eight million, eight hundred eighty-nine thousand, one hundred eighty-nine".