68187995 has 4 divisors (see below), whose sum is σ = 81825600. Its totient is φ = 54550392.

The previous prime is 68187991. The next prime is 68188007. The reversal of 68187995 is 59978186.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68187995 - 2² = 68187991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68187991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6818795 + ... + 6818804.

It is an arithmetic number, because the mean of its divisors is an integer number (20456400).

Almost surely, 2^68187995 is an apocalyptic number.

68187995 is a deficient number, since it is larger than the sum of its proper divisors (13637605).

68187995 is a wasteful number, since it uses less digits than its factorization.

68187995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13637604.

The product of its digits is 1088640, while the sum is 53.

The square root of 68187995 is about 8257.6022548922. The cubic root of 68187995 is about 408.5413066162.

The spelling of 68187995 in words is "sixty-eight million, one hundred eighty-seven thousand, nine hundred ninety-five".