13747397 has 4 divisors (see below), whose sum is σ = 13757196. Its totient is φ = 13737600.

The previous prime is 13747381. The next prime is 13747411. The reversal of 13747397 is 79374731.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 79374731 = 37 ⋅2145263.

It can be written as a sum of positive squares in 2 ways, for example, as 13586596 + 160801 = 3686^2 + 401^2 .

It is a cyclic number.

It is not a de Polignac number, because 13747397 - 2⁴ = 13747381 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 (13747297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2354 + ... + 5747.

It is an arithmetic number, because the mean of its divisors is an integer number (3439299).

Almost surely, 2^13747397 is an apocalyptic number.

It is an amenable number.

13747397 is a deficient number, since it is larger than the sum of its proper divisors (9799).

13747397 is an equidigital number, since it uses as much as digits as its factorization.

13747397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9798.

The product of its digits is 111132, while the sum is 41.

The square root of 13747397 is about 3707.7482384865. The cubic root of 13747397 is about 239.5558742434. Note that the first 3 decimals are identical.

The spelling of 13747397 in words is "thirteen million, seven hundred forty-seven thousand, three hundred ninety-seven".