74091393 has 24 divisors (see below), whose sum is σ = 114516480. Its totient is φ = 46020960.

The previous prime is 74091377. The next prime is 74091439. The reversal of 74091393 is 39319047.

It is not a de Polignac number, because 74091393 - 2⁴ = 74091377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (74091313) 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 23 ways as a sum of consecutive naturals, for example, 6880 + ... + 13982.

It is an arithmetic number, because the mean of its divisors is an integer number (4771520).

Almost surely, 2^74091393 is an apocalyptic number.

It is an amenable number.

74091393 is a deficient number, since it is larger than the sum of its proper divisors (40425087).

74091393 is a wasteful number, since it uses less digits than its factorization.

74091393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7189 (or 7186 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 74091393 is about 8607.6357381107. The cubic root of 74091393 is about 420.0064114668.

The spelling of 74091393 in words is "seventy-four million, ninety-one thousand, three hundred ninety-three".