68186091 has 4 divisors (see below), whose sum is σ = 90914792. Its totient is φ = 45457392.

The previous prime is 68186087. The next prime is 68186119. The reversal of 68186091 is 19068186.

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

It is not a de Polignac number, because 68186091 - 2² = 68186087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68186011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11364346 + ... + 11364351.

It is an arithmetic number, because the mean of its divisors is an integer number (22728698).

Almost surely, 2^68186091 is an apocalyptic number.

68186091 is a deficient number, since it is larger than the sum of its proper divisors (22728701).

68186091 is a wasteful number, since it uses less digits than its factorization.

68186091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22728700.

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 68186091 is about 8257.4869663839. The cubic root of 68186091 is about 408.5375040412.

The spelling of 68186091 in words is "sixty-eight million, one hundred eighty-six thousand, ninety-one".