13409431 has 4 divisors (see below), whose sum is σ = 15325072. Its totient is φ = 11493792.

The previous prime is 13409401. The next prime is 13409441. The reversal of 13409431 is 13490431.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13490431 = 463 ⋅29137.

It is a cyclic number.

It is not a de Polignac number, because 13409431 - 2⁷ = 13409303 is a prime.

It is a super-2 number, since 2×13409431² = 359625679487522, which contains 22 as substring.

It is a zygodrome in base 6.

It is a junction number, because it is equal to n+sod(n) for n = 13409396 and 13409405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13409401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 957810 + ... + 957823.

It is an arithmetic number, because the mean of its divisors is an integer number (3831268).

Almost surely, 2^13409431 is an apocalyptic number.

13409431 is a deficient number, since it is larger than the sum of its proper divisors (1915641).

13409431 is an equidigital number, since it uses as much as digits as its factorization.

13409431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1915640.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 13409431 is about 3661.8889934022. Note that the first 3 decimals coincide. The cubic root of 13409431 is about 237.5764835848.

Adding to 13409431 its reverse (13490431), we get a palindrome (26899862).

The spelling of 13409431 in words is "thirteen million, four hundred nine thousand, four hundred thirty-one".