13509801 has 8 divisors (see below), whose sum is σ = 20014560. Its totient is φ = 9006516.

The previous prime is 13509757. The next prime is 13509803. The reversal of 13509801 is 10890531.

It is not a de Polignac number, because 13509801 - 2⁷ = 13509673 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 500363 = 13509801 / (1 + 3 + 5 + 0 + 9 + 8 + 0 + 1).

It is not an unprimeable number, because it can be changed into a prime (13509803) 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 7 ways as a sum of consecutive naturals, for example, 250155 + ... + 250208.

It is an arithmetic number, because the mean of its divisors is an integer number (2501820).

Almost surely, 2^13509801 is an apocalyptic number.

It is an amenable number.

13509801 is a deficient number, since it is larger than the sum of its proper divisors (6504759).

13509801 is an equidigital number, since it uses as much as digits as its factorization.

13509801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500372 (or 500366 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 13509801 is about 3675.5681193524. The cubic root of 13509801 is about 238.1677665144.

The spelling of 13509801 in words is "thirteen million, five hundred nine thousand, eight hundred one".