13309247 has 8 divisors (see below), whose sum is σ = 15284352. Its totient is φ = 11352600.

The previous prime is 13309243. The next prime is 13309271. The reversal of 13309247 is 74290331.

13309247 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13309247 - 2² = 13309243 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13309243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3029 + ... + 5982.

It is an arithmetic number, because the mean of its divisors is an integer number (1910544).

Almost surely, 2^13309247 is an apocalyptic number.

13309247 is a deficient number, since it is larger than the sum of its proper divisors (1975105).

13309247 is an equidigital number, since it uses as much as digits as its factorization.

13309247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9229.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 13309247 is about 3648.1840688211. The cubic root of 13309247 is about 236.9833467026.

Adding to 13309247 its reverse (74290331), we get a palindrome (87599578).

The spelling of 13309247 in words is "thirteen million, three hundred nine thousand, two hundred forty-seven".