10890409 has 4 divisors (see below), whose sum is σ = 10899460. Its totient is φ = 10881360.

The previous prime is 10890389. The next prime is 10890413. The reversal of 10890409 is 90409801.

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 can be written as a sum of positive squares in 2 ways, for example, as 4995225 + 5895184 = 2235^2 + 2428^2 .

It is a cyclic number.

It is not a de Polignac number, because 10890409 - 2¹⁵ = 10857641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10890449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2382 + ... + 5239.

It is an arithmetic number, because the mean of its divisors is an integer number (2724865).

Almost surely, 2^10890409 is an apocalyptic number.

It is an amenable number.

10890409 is a deficient number, since it is larger than the sum of its proper divisors (9051).

10890409 is an equidigital number, since it uses as much as digits as its factorization.

10890409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9050.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 10890409 is about 3300.0619691151. The cubic root of 10890409 is about 221.6569723337.

The spelling of 10890409 in words is "ten million, eight hundred ninety thousand, four hundred nine".