74055391 has 2 divisors, whose sum is σ = 74055392. Its totient is φ = 74055390.

The previous prime is 74055353. The next prime is 74055419. The reversal of 74055391 is 19355047.

It is a strong prime.

It is an emirp because it is prime and its reverse (19355047) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74055391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74055491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37027695 + 37027696.

It is an arithmetic number, because the mean of its divisors is an integer number (37027696).

Almost surely, 2^74055391 is an apocalyptic number.

74055391 is a deficient number, since it is larger than the sum of its proper divisors (1).

74055391 is an equidigital number, since it uses as much as digits as its factorization.

74055391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 74055391 is about 8605.5442012693. The cubic root of 74055391 is about 419.9383715319.

The spelling of 74055391 in words is "seventy-four million, fifty-five thousand, three hundred ninety-one".