74249191 has 2 divisors, whose sum is σ = 74249192. Its totient is φ = 74249190.

The previous prime is 74249171. The next prime is 74249281. The reversal of 74249191 is 19194247.

It is a weak prime.

It is an emirp because it is prime and its reverse (19194247) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74249191 - 2⁵ = 74249159 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74249191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74249101) 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, 37124595 + 37124596.

It is an arithmetic number, because the mean of its divisors is an integer number (37124596).

Almost surely, 2^74249191 is an apocalyptic number.

74249191 is a deficient number, since it is larger than the sum of its proper divisors (1).

74249191 is an equidigital number, since it uses as much as digits as its factorization.

74249191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 37.

The square root of 74249191 is about 8616.7970267380. The cubic root of 74249191 is about 420.3043730946.

The spelling of 74249191 in words is "seventy-four million, two hundred forty-nine thousand, one hundred ninety-one".