10381209 has 4 divisors (see below), whose sum is σ = 13841616. Its totient is φ = 6920804.

The previous prime is 10381207. The next prime is 10381223. The reversal of 10381209 is 90218301.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10381209 - 2¹ = 10381207 is a prime.

It is a super-3 number, since 3×10381209³ (a number of 22 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10381207) 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, 1730199 + ... + 1730204.

It is an arithmetic number, because the mean of its divisors is an integer number (3460404).

Almost surely, 2^10381209 is an apocalyptic number.

It is an amenable number.

10381209 is a deficient number, since it is larger than the sum of its proper divisors (3460407).

10381209 is an equidigital number, since it uses as much as digits as its factorization.

10381209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3460406.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 10381209 is about 3221.9883612453. The cubic root of 10381209 is about 218.1470334855.

The spelling of 10381209 in words is "ten million, three hundred eighty-one thousand, two hundred nine".