68409187 has 8 divisors (see below), whose sum is σ = 85289472. Its totient is φ = 53305800.

The previous prime is 68409179. The next prime is 68409221. The reversal of 68409187 is 78190486.

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 68409187 - 2³ = 68409179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68409137) 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, 444139 + ... + 444292.

It is an arithmetic number, because the mean of its divisors is an integer number (10661184).

Almost surely, 2^68409187 is an apocalyptic number.

68409187 is a deficient number, since it is larger than the sum of its proper divisors (16880285).

68409187 is a wasteful number, since it uses less digits than its factorization.

68409187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888449.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 68409187 is about 8270.9846451314. The cubic root of 68409187 is about 408.9825794674.

The spelling of 68409187 in words is "sixty-eight million, four hundred nine thousand, one hundred eighty-seven".