90823109 has 8 divisors (see below), whose sum is σ = 97886712. Its totient is φ = 83770560.

The previous prime is 90823063. The next prime is 90823121. The reversal of 90823109 is 90132809.

It can be written as a sum of positive squares in 4 ways, for example, as 2209 + 90820900 = 47^2 + 9530^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90823109 - 2¹⁶ = 90757573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90823199) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23879 + ... + 27419.

It is an arithmetic number, because the mean of its divisors is an integer number (12235839).

Almost surely, 2^90823109 is an apocalyptic number.

It is an amenable number.

90823109 is a deficient number, since it is larger than the sum of its proper divisors (7063603).

90823109 is a wasteful number, since it uses less digits than its factorization.

90823109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5527.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 90823109 is about 9530.1158964621. The cubic root of 90823109 is about 449.5025102939.

The spelling of 90823109 in words is "ninety million, eight hundred twenty-three thousand, one hundred nine".