90319 has 4 divisors (see below), whose sum is σ = 91000. Its totient is φ = 89640.

The previous prime is 90313. The next prime is 90353. The reversal of 90319 is 91309.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 90319 - 2⁷ = 90191 is a prime.

It is a super-2 number, since 2×90319² = 16315043522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90319.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90313) 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, 69 + ... + 430.

It is an arithmetic number, because the mean of its divisors is an integer number (22750).

2⁹⁰³¹⁹ is an apocalyptic number.

90319 is a deficient number, since it is larger than the sum of its proper divisors (681).

90319 is a wasteful number, since it uses less digits than its factorization.

90319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680.

The product of its (nonzero) digits is 243, while the sum is 22.

The square root of 90319 is about 300.5311963840. The cubic root of 90319 is about 44.8669319998.

Subtracting 90319 from its reverse (91309), we obtain a triangular number (990 = T₄₄).

The spelling of 90319 in words is "ninety thousand, three hundred nineteen".