68019191 has 2 divisors, whose sum is σ = 68019192. Its totient is φ = 68019190.

The previous prime is 68019179. The next prime is 68019223. The reversal of 68019191 is 19191086.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68019191 - 2¹⁸ = 67757047 is a prime.

It is a super-2 number, since 2×68019191² = 9253220688588962, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68019131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34009595 + 34009596.

It is an arithmetic number, because the mean of its divisors is an integer number (34009596).

Almost surely, 2^68019191 is an apocalyptic number.

68019191 is a deficient number, since it is larger than the sum of its proper divisors (1).

68019191 is an equidigital number, since it uses as much as digits as its factorization.

68019191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 35.

The square root of 68019191 is about 8247.3747944422. The cubic root of 68019191 is about 408.2039041502.

The spelling of 68019191 in words is "sixty-eight million, nineteen thousand, one hundred ninety-one".