13505493 has 4 divisors (see below), whose sum is σ = 18007328. Its totient is φ = 9003660.

The previous prime is 13505449. The next prime is 13505501. The reversal of 13505493 is 39450531.

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 de Polignac number, because none of the positive numbers 2^k-13505493 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13505493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13505413) 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 3 ways as a sum of consecutive naturals, for example, 2250913 + ... + 2250918.

It is an arithmetic number, because the mean of its divisors is an integer number (4501832).

Almost surely, 2^13505493 is an apocalyptic number.

It is an amenable number.

13505493 is a deficient number, since it is larger than the sum of its proper divisors (4501835).

13505493 is an equidigital number, since it uses as much as digits as its factorization.

13505493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4501834.

The product of its (nonzero) digits is 8100, while the sum is 30.

The square root of 13505493 is about 3674.9820407724. The cubic root of 13505493 is about 238.1424482086.

The spelling of 13505493 in words is "thirteen million, five hundred five thousand, four hundred ninety-three".