90829 has 4 divisors (see below), whose sum is σ = 92380. Its totient is φ = 89280.

The previous prime is 90823. The next prime is 90833. The reversal of 90829 is 92809.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9604 + 81225 = 98^2 + 285^2 .

It is a cyclic number.

It is not a de Polignac number, because 90829 - 2³ = 90821 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90797 and 90806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90821) 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, 684 + ... + 805.

It is an arithmetic number, because the mean of its divisors is an integer number (23095).

2⁹⁰⁸²⁹ is an apocalyptic number.

It is an amenable number.

90829 is a deficient number, since it is larger than the sum of its proper divisors (1551).

90829 is a wasteful number, since it uses less digits than its factorization.

90829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1550.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 90829 is about 301.3784995649. The cubic root of 90829 is about 44.9512228680.

It can be divided in two parts, 90 and 829, that added together give a palindrome (919).

The spelling of 90829 in words is "ninety thousand, eight hundred twenty-nine".