68188137 has 4 divisors (see below), whose sum is σ = 90917520. Its totient is φ = 45458756.

The previous prime is 68188097. The next prime is 68188177. The reversal of 68188137 is 73188186.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (68188097) and next prime (68188177).

It is a cyclic number.

It is not a de Polignac number, because 68188137 - 2⁷ = 68188009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68188177) 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, 11364687 + ... + 11364692.

It is an arithmetic number, because the mean of its divisors is an integer number (22729380).

Almost surely, 2^68188137 is an apocalyptic number.

It is an amenable number.

68188137 is a deficient number, since it is larger than the sum of its proper divisors (22729383).

68188137 is a wasteful number, since it uses less digits than its factorization.

68188137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22729382.

The product of its digits is 64512, while the sum is 42.

The square root of 68188137 is about 8257.6108530252. The cubic root of 68188137 is about 408.5415902087.

The spelling of 68188137 in words is "sixty-eight million, one hundred eighty-eight thousand, one hundred thirty-seven".