68309187 has 8 divisors (see below), whose sum is σ = 91734720. Its totient is φ = 45211560.

The previous prime is 68309183. The next prime is 68309207. The reversal of 68309187 is 78190386.

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

It is not a de Polignac number, because 68309187 - 2² = 68309183 is a prime.

It is a super-2 number, since 2×68309187² = 9332290057201938, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68309183) 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, 81489 + ... + 82322.

It is an arithmetic number, because the mean of its divisors is an integer number (11466840).

Almost surely, 2^68309187 is an apocalyptic number.

68309187 is a deficient number, since it is larger than the sum of its proper divisors (23425533).

68309187 is a wasteful number, since it uses less digits than its factorization.

68309187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163953.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 68309187 is about 8264.9372048431. The cubic root of 68309187 is about 408.7831998022.

The spelling of 68309187 in words is "sixty-eight million, three hundred nine thousand, one hundred eighty-seven".