13409147 has 4 divisors (see below), whose sum is σ = 13694496. Its totient is φ = 13123800.

The previous prime is 13409119. The next prime is 13409153. The reversal of 13409147 is 74190431.

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

It is a cyclic number.

It is not a de Polignac number, because 13409147 - 2⁸ = 13408891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13409177) 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, 142604 + ... + 142697.

It is an arithmetic number, because the mean of its divisors is an integer number (3423624).

Almost surely, 2^13409147 is an apocalyptic number.

13409147 is a deficient number, since it is larger than the sum of its proper divisors (285349).

13409147 is an equidigital number, since it uses as much as digits as its factorization.

13409147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285348.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 13409147 is about 3661.8502153966. The cubic root of 13409147 is about 237.5748063524.

Adding to 13409147 its reverse (74190431), we get a palindrome (87599578).

The spelling of 13409147 in words is "thirteen million, four hundred nine thousand, one hundred forty-seven".