13409307 has 20 divisors (see below), whose sum is σ = 21087880. Its totient is φ = 8468064.

The previous prime is 13409303. The next prime is 13409309. The reversal of 13409307 is 70390431.

13409307 is nontrivially palindromic in base 7.

13409307 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13409307 - 2² = 13409303 is a prime.

It is a super-3 number, since 3×13409307³ (a number of 22 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13409303) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2818 + ... + 5895.

It is an arithmetic number, because the mean of its divisors is an integer number (1054394).

Almost surely, 2^13409307 is an apocalyptic number.

13409307 is a deficient number, since it is larger than the sum of its proper divisors (7678573).

13409307 is an equidigital number, since it uses as much as digits as its factorization.

13409307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8744 (or 8735 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 13409307 is about 3661.8720622108. The cubic root of 13409307 is about 237.5757512750.

Adding to 13409307 its reverse (70390431), we get a palindrome (83799738).

The spelling of 13409307 in words is "thirteen million, four hundred nine thousand, three hundred seven".