75613 has 4 divisors (see below), whose sum is σ = 76608. Its totient is φ = 74620.

The previous prime is 75611. The next prime is 75617. The reversal of 75613 is 31657.

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 75613 - 2¹ = 75611 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75611) 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, 373 + ... + 538.

It is an arithmetic number, because the mean of its divisors is an integer number (19152).

2⁷⁵⁶¹³ is an apocalyptic number.

It is an amenable number.

75613 is a deficient number, since it is larger than the sum of its proper divisors (995).

75613 is an equidigital number, since it uses as much as digits as its factorization.

75613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994.

The product of its digits is 630, while the sum is 22.

The square root of 75613 is about 274.9781809526. The cubic root of 75613 is about 42.2862159276.

Subtracting from 75613 its reverse (31657), we obtain a triangular number (43956 = T₂₉₆).

The spelling of 75613 in words is "seventy-five thousand, six hundred thirteen".