13503993 has 8 divisors (see below), whose sum is σ = 18388608. Its totient is φ = 8811024.

The previous prime is 13503991. The next prime is 13504033. The reversal of 13503993 is 39930531.

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

It is not a de Polignac number, because 13503993 - 2¹ = 13503991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13503991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47746 + ... + 48027.

It is an arithmetic number, because the mean of its divisors is an integer number (2298576).

Almost surely, 2^13503993 is an apocalyptic number.

It is an amenable number.

13503993 is a deficient number, since it is larger than the sum of its proper divisors (4884615).

13503993 is an equidigital number, since it uses as much as digits as its factorization.

13503993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95823.

The product of its (nonzero) digits is 10935, while the sum is 33.

The square root of 13503993 is about 3674.7779524755. Note that the first 3 decimals coincide. The cubic root of 13503993 is about 238.1336313788.

The spelling of 13503993 in words is "thirteen million, five hundred three thousand, nine hundred ninety-three".