13409397 has 24 divisors (see below), whose sum is σ = 20311200. Its totient is φ = 8513568.

The previous prime is 13409369. The next prime is 13409401. The reversal of 13409397 is 79390431.

It is not a de Polignac number, because 13409397 - 2¹¹ = 13407349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13409327) 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 23 ways as a sum of consecutive naturals, for example, 21354 + ... + 21972.

It is an arithmetic number, because the mean of its divisors is an integer number (846300).

Almost surely, 2^13409397 is an apocalyptic number.

It is an amenable number.

13409397 is a deficient number, since it is larger than the sum of its proper divisors (6901803).

13409397 is a wasteful number, since it uses less digits than its factorization.

13409397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737 (or 734 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 13409397 is about 3661.8843509865. The cubic root of 13409397 is about 237.5762827906.

The spelling of 13409397 in words is "thirteen million, four hundred nine thousand, three hundred ninety-seven".