74240609 has 4 divisors (see below), whose sum is σ = 76800660. Its totient is φ = 71680560.

The previous prime is 74240597. The next prime is 74240641. The reversal of 74240609 is 90604247.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90604247 = 2161 ⋅41927.

It can be written as a sum of positive squares in 2 ways, for example, as 13712209 + 60528400 = 3703^2 + 7780^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74240609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74240909) 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, 1279982 + ... + 1280039.

It is an arithmetic number, because the mean of its divisors is an integer number (19200165).

Almost surely, 2^74240609 is an apocalyptic number.

It is an amenable number.

74240609 is a deficient number, since it is larger than the sum of its proper divisors (2560051).

74240609 is a wasteful number, since it uses less digits than its factorization.

74240609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2560050.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 74240609 is about 8616.2990314868. The cubic root of 74240609 is about 420.2881790186.

The spelling of 74240609 in words is "seventy-four million, two hundred forty thousand, six hundred nine".