13731385 has 8 divisors (see below), whose sum is σ = 16686720. Its totient is φ = 10845744.

The previous prime is 13731353. The next prime is 13731401. The reversal of 13731385 is 58313731.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 13731385 - 2⁵ = 13731353 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 16987 + ... + 17776.

It is an arithmetic number, because the mean of its divisors is an integer number (2085840).

Almost surely, 2^13731385 is an apocalyptic number.

It is an amenable number.

13731385 is a deficient number, since it is larger than the sum of its proper divisors (2955335).

13731385 is an equidigital number, since it uses as much as digits as its factorization.

13731385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34847.

The product of its digits is 7560, while the sum is 31.

The square root of 13731385 is about 3705.5883473478. The cubic root of 13731385 is about 239.4628321732.

The spelling of 13731385 in words is "thirteen million, seven hundred thirty-one thousand, three hundred eighty-five".