13840513 has 4 divisors (see below), whose sum is σ = 14135040. Its totient is φ = 13545988.

The previous prime is 13840507. The next prime is 13840517. The reversal of 13840513 is 31504831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13840513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13840517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147193 + ... + 147286.

It is an arithmetic number, because the mean of its divisors is an integer number (3533760).

Almost surely, 2^13840513 is an apocalyptic number.

It is an amenable number.

13840513 is a deficient number, since it is larger than the sum of its proper divisors (294527).

13840513 is an equidigital number, since it uses as much as digits as its factorization.

13840513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294526.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 13840513 is about 3720.2839945359. The cubic root of 13840513 is about 240.0955233179.

The spelling of 13840513 in words is "thirteen million, eight hundred forty thousand, five hundred thirteen".