68442187 has 8 divisors (see below), whose sum is σ = 79056432. Its totient is φ = 58560000.

The previous prime is 68442169. The next prime is 68442223. The reversal of 68442187 is 78124486.

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

It is a cyclic number.

It is not a de Polignac number, because 68442187 - 2¹¹ = 68440139 is a prime.

It is a super-2 number, since 2×68442187² = 9368665922685938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68442137) 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, 182814 + ... + 183187.

It is an arithmetic number, because the mean of its divisors is an integer number (9882054).

Almost surely, 2^68442187 is an apocalyptic number.

68442187 is a deficient number, since it is larger than the sum of its proper divisors (10614245).

68442187 is a wasteful number, since it uses less digits than its factorization.

68442187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366029.

The product of its digits is 86016, while the sum is 40.

The square root of 68442187 is about 8272.9793303259. The cubic root of 68442187 is about 409.0483321151.

The spelling of 68442187 in words is "sixty-eight million, four hundred forty-two thousand, one hundred eighty-seven".