11406209 has 4 divisors (see below), whose sum is σ = 11489604. Its totient is φ = 11322816.

The previous prime is 11406203. The next prime is 11406217. The reversal of 11406209 is 90260411.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8526400 + 2879809 = 2920^2 + 1697^2 .

It is a cyclic number.

It is not a de Polignac number, because 11406209 - 2¹² = 11402113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11406203) 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, 41492 + ... + 41765.

It is an arithmetic number, because the mean of its divisors is an integer number (2872401).

Almost surely, 2^11406209 is an apocalyptic number.

It is an amenable number.

11406209 is a deficient number, since it is larger than the sum of its proper divisors (83395).

11406209 is an equidigital number, since it uses as much as digits as its factorization.

11406209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83394.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 11406209 is about 3377.3079516088. The cubic root of 11406209 is about 225.1025639398.

The spelling of 11406209 in words is "eleven million, four hundred six thousand, two hundred nine".