75749 has 4 divisors (see below), whose sum is σ = 76320. Its totient is φ = 75180.

The previous prime is 75743. The next prime is 75767. The reversal of 75749 is 94757.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75749 is a prime.

It is a super-2 number, since 2×75749² = 11475822002, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75743) 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, 32 + ... + 390.

It is an arithmetic number, because the mean of its divisors is an integer number (19080).

2⁷⁵⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

75749 is a deficient number, since it is larger than the sum of its proper divisors (571).

75749 is a wasteful number, since it uses less digits than its factorization.

75749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570.

The product of its digits is 8820, while the sum is 32.

The square root of 75749 is about 275.2253622034. The cubic root of 75749 is about 42.3115531971.

The spelling of 75749 in words is "seventy-five thousand, seven hundred forty-nine".