13398181 has 8 divisors (see below), whose sum is σ = 13823640. Its totient is φ = 12976128.

The previous prime is 13398157. The next prime is 13398233. The reversal of 13398181 is 18189331.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4452100 + 8946081 = 2110^2 + 2991^2 .

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 13398181 - 2⁷ = 13398053 is a prime.

It is a super-2 number, since 2×13398181² = 359022508217522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13398131) 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, 8805 + ... + 10213.

It is an arithmetic number, because the mean of its divisors is an integer number (1727955).

Almost surely, 2^13398181 is an apocalyptic number.

It is an amenable number.

13398181 is a deficient number, since it is larger than the sum of its proper divisors (425459).

13398181 is a wasteful number, since it uses less digits than its factorization.

13398181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1703.

The product of its digits is 5184, while the sum is 34.

The square root of 13398181 is about 3660.3525786459. The cubic root of 13398181 is about 237.5100258002.

The spelling of 13398181 in words is "thirteen million, three hundred ninety-eight thousand, one hundred eighty-one".