10403209 has 2 divisors, whose sum is σ = 10403210. Its totient is φ = 10403208.

The previous prime is 10403191. The next prime is 10403213. The reversal of 10403209 is 90230401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6969600 + 3433609 = 2640^2 + 1853^2 .

It is a cyclic number.

It is not a de Polignac number, because 10403209 - 2¹⁵ = 10370441 is a prime.

It is not a weakly prime, because it can be changed into another prime (10403219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5201604 + 5201605.

It is an arithmetic number, because the mean of its divisors is an integer number (5201605).

Almost surely, 2^10403209 is an apocalyptic number.

It is an amenable number.

10403209 is a deficient number, since it is larger than the sum of its proper divisors (1).

10403209 is an equidigital number, since it uses as much as digits as its factorization.

10403209 is an evil number, because the sum of its binary digits is even.

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

The square root of 10403209 is about 3225.4005952749. The cubic root of 10403209 is about 218.3010248148.

The spelling of 10403209 in words is "ten million, four hundred three thousand, two hundred nine".