74868191 has 2 divisors, whose sum is σ = 74868192. Its totient is φ = 74868190.

The previous prime is 74868163. The next prime is 74868217. The reversal of 74868191 is 19186847.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74868191 is a prime.

It is a super-2 number, since 2×74868191² = 11210492047224962, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74868161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37434095 + 37434096.

It is an arithmetic number, because the mean of its divisors is an integer number (37434096).

Almost surely, 2^74868191 is an apocalyptic number.

74868191 is a deficient number, since it is larger than the sum of its proper divisors (1).

74868191 is an equidigital number, since it uses as much as digits as its factorization.

74868191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 44.

The square root of 74868191 is about 8652.6406951866. The cubic root of 74868191 is about 421.4691388589.

The spelling of 74868191 in words is "seventy-four million, eight hundred sixty-eight thousand, one hundred ninety-one".