75539 has 2 divisors, whose sum is σ = 75540. Its totient is φ = 75538.

The previous prime is 75533. The next prime is 75541. The reversal of 75539 is 93557.

It is a strong prime.

It is an emirp because it is prime and its reverse (93557) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75539 - 2¹² = 71443 is a prime.

It is a super-2 number, since 2×75539² = 11412281042, which contains 22 as substring.

Together with 75541, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (75533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37769 + 37770.

It is an arithmetic number, because the mean of its divisors is an integer number (37770).

2⁷⁵⁵³⁹ is an apocalyptic number.

75539 is a deficient number, since it is larger than the sum of its proper divisors (1).

75539 is an equidigital number, since it uses as much as digits as its factorization.

75539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4725, while the sum is 29.

The square root of 75539 is about 274.8435918845. The cubic root of 75539 is about 42.2724167073.

The spelling of 75539 in words is "seventy-five thousand, five hundred thirty-nine".