74384393 has 4 divisors (see below), whose sum is σ = 76394820. Its totient is φ = 72373968.

The previous prime is 74384371. The next prime is 74384413. The reversal of 74384393 is 39348347.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 71436304 + 2948089 = 8452^2 + 1717^2 .

It is a cyclic number.

It is not a de Polignac number, because 74384393 - 2⁶ = 74384329 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74384393.

It is not an unprimeable number, because it can be changed into a prime (74384363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1005158 + ... + 1005231.

It is an arithmetic number, because the mean of its divisors is an integer number (19098705).

Almost surely, 2^74384393 is an apocalyptic number.

It is an amenable number.

74384393 is a deficient number, since it is larger than the sum of its proper divisors (2010427).

74384393 is a wasteful number, since it uses less digits than its factorization.

74384393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2010426.

The product of its digits is 217728, while the sum is 41.

The square root of 74384393 is about 8624.6387170710. The cubic root of 74384393 is about 420.5593322577.

The spelling of 74384393 in words is "seventy-four million, three hundred eighty-four thousand, three hundred ninety-three".