75397 has 4 divisors (see below), whose sum is σ = 86176. Its totient is φ = 64620.

The previous prime is 75391. The next prime is 75401. The reversal of 75397 is 79357.

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.

It is a cyclic number.

It is not a de Polignac number, because 75397 - 2³ = 75389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5379 + ... + 5392.

It is an arithmetic number, because the mean of its divisors is an integer number (21544).

2⁷⁵³⁹⁷ is an apocalyptic number.

It is an amenable number.

75397 is a deficient number, since it is larger than the sum of its proper divisors (10779).

75397 is a wasteful number, since it uses less digits than its factorization.

75397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10778.

The product of its digits is 6615, while the sum is 31.

The square root of 75397 is about 274.5851416228. The cubic root of 75397 is about 42.2459118624.

The spelling of 75397 in words is "seventy-five thousand, three hundred ninety-seven".