74384999 has 8 divisors (see below), whose sum is σ = 80349360. Its totient is φ = 68455296.

The previous prime is 74384993. The next prime is 74385007. The reversal of 74384999 is 99948347.

It is a happy number.

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

It is not a de Polignac number, because 74384999 - 2²⁰ = 73336423 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74384999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74384993) 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, 4109 + ... + 12870.

It is an arithmetic number, because the mean of its divisors is an integer number (10043670).

Almost surely, 2^74384999 is an apocalyptic number.

74384999 is a deficient number, since it is larger than the sum of its proper divisors (5964361).

74384999 is a wasteful number, since it uses less digits than its factorization.

74384999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17329.

The product of its digits is 1959552, while the sum is 53.

The square root of 74384999 is about 8624.6738489058. The cubic root of 74384999 is about 420.5604743354.

It can be divided in two parts, 74 and 384999, that multiplied together give a triangular number (28489926 = T₇₅₄₈).

The spelling of 74384999 in words is "seventy-four million, three hundred eighty-four thousand, nine hundred ninety-nine".