74299839 has 8 divisors (see below), whose sum is σ = 102262272. Its totient is φ = 47935320.

The previous prime is 74299817. The next prime is 74299871. The reversal of 74299839 is 93899247.

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

It is not a de Polignac number, because 74299839 - 2⁵ = 74299807 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 74299791 and 74299800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74299879) 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, 399369 + ... + 399554.

It is an arithmetic number, because the mean of its divisors is an integer number (12782784).

Almost surely, 2^74299839 is an apocalyptic number.

74299839 is a deficient number, since it is larger than the sum of its proper divisors (27962433).

74299839 is a wasteful number, since it uses less digits than its factorization.

74299839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798957.

The product of its digits is 979776, while the sum is 51.

The square root of 74299839 is about 8619.7354367753. The cubic root of 74299839 is about 420.3999195335.

The spelling of 74299839 in words is "seventy-four million, two hundred ninety-nine thousand, eight hundred thirty-nine".