75523 has 4 divisors (see below), whose sum is σ = 86320. Its totient is φ = 64728.

The previous prime is 75521. The next prime is 75527. The reversal of 75523 is 32557.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32557 = 7 ⋅4651.

It is a cyclic number.

It is not a de Polignac number, because 75523 - 2¹ = 75521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 75494 and 75503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75521) 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, 5388 + ... + 5401.

It is an arithmetic number, because the mean of its divisors is an integer number (21580).

2⁷⁵⁵²³ is an apocalyptic number.

75523 is a deficient number, since it is larger than the sum of its proper divisors (10797).

75523 is a wasteful number, since it uses less digits than its factorization.

75523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10796.

The product of its digits is 1050, while the sum is 22.

The square root of 75523 is about 274.8144828789. The cubic root of 75523 is about 42.2694319073.

The spelling of 75523 in words is "seventy-five thousand, five hundred twenty-three".