13433209 has 4 divisors (see below), whose sum is σ = 14140240. Its totient is φ = 12726180.

The previous prime is 13433207. The next prime is 13433291. The reversal of 13433209 is 90233431.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90233431 = 941 ⋅95891.

It is a cyclic number.

It is not a de Polignac number, because 13433209 - 2¹ = 13433207 is a prime.

It is a super-2 number, since 2×13433209² = 360902208075362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13433201) 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, 353487 + ... + 353524.

It is an arithmetic number, because the mean of its divisors is an integer number (3535060).

Almost surely, 2^13433209 is an apocalyptic number.

13433209 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

13433209 is a deficient number, since it is larger than the sum of its proper divisors (707031).

13433209 is an equidigital number, since it uses as much as digits as its factorization.

13433209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707030.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 13433209 is about 3665.1342403792. The cubic root of 13433209 is about 237.7168265485.

The spelling of 13433209 in words is "thirteen million, four hundred thirty-three thousand, two hundred nine".