10203409 has 4 divisors (see below), whose sum is σ = 10370740. Its totient is φ = 10036080.

The previous prime is 10203397. The next prime is 10203443. The reversal of 10203409 is 90430201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90430201 = 971 ⋅93131.

It can be written as a sum of positive squares in 2 ways, for example, as 2624400 + 7579009 = 1620^2 + 2753^2 .

It is a cyclic number.

It is not a de Polignac number, because 10203409 - 2⁵ = 10203377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10203469) 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, 83574 + ... + 83695.

It is an arithmetic number, because the mean of its divisors is an integer number (2592685).

Almost surely, 2^10203409 is an apocalyptic number.

It is an amenable number.

10203409 is a deficient number, since it is larger than the sum of its proper divisors (167331).

10203409 is an equidigital number, since it uses as much as digits as its factorization.

10203409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167330.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 10203409 is about 3194.2775396011. The cubic root of 10203409 is about 216.8944463180.

The spelling of 10203409 in words is "ten million, two hundred three thousand, four hundred nine".