74397 has 4 divisors (see below), whose sum is σ = 99200. Its totient is φ = 49596.

The previous prime is 74383. The next prime is 74411. The reversal of 74397 is 79347.

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: 79347 = 3 ⋅26449.

It is an interprime number because it is at equal distance from previous prime (74383) and next prime (74411).

It is not a de Polignac number, because 74397 - 2⁴ = 74381 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74317) 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, 12397 + ... + 12402.

It is an arithmetic number, because the mean of its divisors is an integer number (24800).

2⁷⁴³⁹⁷ is an apocalyptic number.

It is an amenable number.

74397 is a deficient number, since it is larger than the sum of its proper divisors (24803).

74397 is a wasteful number, since it uses less digits than its factorization.

74397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24802.

The product of its digits is 5292, while the sum is 30.

The square root of 74397 is about 272.7581346175. The cubic root of 74397 is about 42.0583090342.

Subtracting 74397 from its reverse (79347), we obtain a triangular number (4950 = T₉₉).

The spelling of 74397 in words is "seventy-four thousand, three hundred ninety-seven".