74397569 has 4 divisors (see below), whose sum is σ = 75980544. Its totient is φ = 72814596.

The previous prime is 74397527. The next prime is 74397581. The reversal of 74397569 is 96579347.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 96579347 = 733 ⋅131759.

It is a cyclic number.

It is not a de Polignac number, because 74397569 - 2⁸ = 74397313 is a prime.

It is a super-2 number, since 2×74397569² = 11069996546219522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74337569) 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, 791417 + ... + 791510.

It is an arithmetic number, because the mean of its divisors is an integer number (18995136).

Almost surely, 2^74397569 is an apocalyptic number.

It is an amenable number.

74397569 is a deficient number, since it is larger than the sum of its proper divisors (1582975).

74397569 is a wasteful number, since it uses less digits than its factorization.

74397569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1582974.

The product of its digits is 1428840, while the sum is 50.

The square root of 74397569 is about 8625.4025413310. The cubic root of 74397569 is about 420.5841625677.

The spelling of 74397569 in words is "seventy-four million, three hundred ninety-seven thousand, five hundred sixty-nine".