74344591 has 2 divisors, whose sum is σ = 74344592. Its totient is φ = 74344590.

The previous prime is 74344547. The next prime is 74344643. The reversal of 74344591 is 19544347.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 74344591 - 2⁹ = 74344079 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74344591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74344091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37172295 + 37172296.

It is an arithmetic number, because the mean of its divisors is an integer number (37172296).

Almost surely, 2^74344591 is an apocalyptic number.

74344591 is a deficient number, since it is larger than the sum of its proper divisors (1).

74344591 is an equidigital number, since it uses as much as digits as its factorization.

74344591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 37.

The square root of 74344591 is about 8622.3309493431. The cubic root of 74344591 is about 420.4843071600.

The spelling of 74344591 in words is "seventy-four million, three hundred forty-four thousand, five hundred ninety-one".