90759 has 4 divisors (see below), whose sum is σ = 121016. Its totient is φ = 60504.

The previous prime is 90749. The next prime is 90787. The reversal of 90759 is 95709.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 90759 - 2⁷ = 90631 is a prime.

It is a D-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 (90709) 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, 15124 + ... + 15129.

It is an arithmetic number, because the mean of its divisors is an integer number (30254).

2⁹⁰⁷⁵⁹ is an apocalyptic number.

90759 is a deficient number, since it is larger than the sum of its proper divisors (30257).

90759 is a wasteful number, since it uses less digits than its factorization.

90759 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30256.

The product of its (nonzero) digits is 2835, while the sum is 30.

The square root of 90759 is about 301.2623441454. The cubic root of 90759 is about 44.9396722462.

Subtracting 90759 from its reverse (95709), we obtain a triangular number (4950 = T₉₉).

The spelling of 90759 in words is "ninety thousand, seven hundred fifty-nine".