68850191 has 4 divisors (see below), whose sum is σ = 69819984. Its totient is φ = 67880400.

The previous prime is 68850157. The next prime is 68850211. The reversal of 68850191 is 19105886.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19105886 = 2 ⋅9552943.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68850191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68850491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 484790 + ... + 484931.

It is an arithmetic number, because the mean of its divisors is an integer number (17454996).

Almost surely, 2^68850191 is an apocalyptic number.

68850191 is a deficient number, since it is larger than the sum of its proper divisors (969793).

68850191 is an equidigital number, since it uses as much as digits as its factorization.

68850191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969792.

The product of its (nonzero) digits is 17280, while the sum is 38.

The square root of 68850191 is about 8297.6015209216. The cubic root of 68850191 is about 409.8595414170.

The spelling of 68850191 in words is "sixty-eight million, eight hundred fifty thousand, one hundred ninety-one".