74397239 has 6 divisors (see below), whose sum is σ = 86543784. Its totient is φ = 63769020.

The previous prime is 74397227. The next prime is 74397251. The reversal of 74397239 is 93279347.

It is an interprime number because it is at equal distance from previous prime (74397227) and next prime (74397251).

It is not a de Polignac number, because 74397239 - 2²⁰ = 73348663 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 74397239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74397259) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 759107 + ... + 759204.

It is an arithmetic number, because the mean of its divisors is an integer number (14423964).

Almost surely, 2^74397239 is an apocalyptic number.

74397239 is a deficient number, since it is larger than the sum of its proper divisors (12146545).

74397239 is a wasteful number, since it uses less digits than its factorization.

74397239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1518325 (or 1518318 counting only the distinct ones).

The product of its digits is 285768, while the sum is 44.

The square root of 74397239 is about 8625.3834117679. The cubic root of 74397239 is about 420.5835407150.

The spelling of 74397239 in words is "seventy-four million, three hundred ninety-seven thousand, two hundred thirty-nine".