13432409 has 4 divisors (see below), whose sum is σ = 13538304. Its totient is φ = 13326516.

The previous prime is 13432403. The next prime is 13432429. The reversal of 13432409 is 90423431.

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: 90423431 = 7 ⋅12917633.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13432409 is a prime.

It is a super-2 number, since 2×13432409² = 360859223086562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13432403) 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, 52757 + ... + 53010.

It is an arithmetic number, because the mean of its divisors is an integer number (3384576).

Almost surely, 2^13432409 is an apocalyptic number.

It is an amenable number.

13432409 is a deficient number, since it is larger than the sum of its proper divisors (105895).

13432409 is a wasteful number, since it uses less digits than its factorization.

13432409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105894.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 13432409 is about 3665.0251022333. The cubic root of 13432409 is about 237.7121074667.

The spelling of 13432409 in words is "thirteen million, four hundred thirty-two thousand, four hundred nine".