68442189 has 8 divisors (see below), whose sum is σ = 91303680. Its totient is φ = 45604416.

The previous prime is 68442169. The next prime is 68442223. The reversal of 68442189 is 98124486.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68442189 - 2¹² = 68438093 is a prime.

It is a super-2 number, since 2×68442189² = 9368666470223442, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 68442189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68442169) 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, 2532 + ... + 11970.

It is an arithmetic number, because the mean of its divisors is an integer number (11412960).

Almost surely, 2^68442189 is an apocalyptic number.

It is an amenable number.

68442189 is a deficient number, since it is larger than the sum of its proper divisors (22861491).

68442189 is a wasteful number, since it uses less digits than its factorization.

68442189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11859.

The product of its digits is 110592, while the sum is 42.

The square root of 68442189 is about 8272.9794512014. The cubic root of 68442189 is about 409.0483360994.

The spelling of 68442189 in words is "sixty-eight million, four hundred forty-two thousand, one hundred eighty-nine".