90049 has 4 divisors (see below), whose sum is σ = 95364. Its totient is φ = 84736.
The previous prime is 90031. The next prime is 90053. The reversal of 90049 is 94009.
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 71824 + 18225 = 268^2 + 135^2 .
It is a cyclic number.
It is not a de Polignac number, because 90049 - 25 = 90017 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (90019) 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, 2632 + ... + 2665.
It is an arithmetic number, because the mean of its divisors is an integer number (23841).
290049 is an apocalyptic number.
It is an amenable number.
90049 is a deficient number, since it is larger than the sum of its proper divisors (5315).
90049 is a wasteful number, since it uses less digits than its factorization.
90049 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 5314.
The product of its (nonzero) digits is 324, while the sum is 22.
The square root of 90049 is about 300.0816555540. The cubic root of 90049 is about 44.8221789098.
It can be divided in two parts, 900 and 49, that multiplied together give a square (44100 = 2102).
The spelling of 90049 in words is "ninety thousand, forty-nine".
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