74393999 has 8 divisors (see below), whose sum is σ = 76382592. Its totient is φ = 72417240.

The previous prime is 74393959. The next prime is 74394007. The reversal of 74393999 is 99939347.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 74393999 - 2⁸ = 74393743 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 74393999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74393909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10592 + ... + 16154.

It is an arithmetic number, because the mean of its divisors is an integer number (9547824).

Almost surely, 2^74393999 is an apocalyptic number.

74393999 is a deficient number, since it is larger than the sum of its proper divisors (1988593).

74393999 is a wasteful number, since it uses less digits than its factorization.

74393999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5917.

The product of its digits is 1653372, while the sum is 53.

The square root of 74393999 is about 8625.1955919851. The cubic root of 74393999 is about 420.5774351549.

The spelling of 74393999 in words is "seventy-four million, three hundred ninety-three thousand, nine hundred ninety-nine".