13661499 has 8 divisors (see below), whose sum is σ = 18514192. Its totient is φ = 8958240.

The previous prime is 13661497. The next prime is 13661507. The reversal of 13661499 is 99416631.

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

It is not a de Polignac number, because 13661499 - 2¹ = 13661497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13661491) 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 7 ways as a sum of consecutive naturals, for example, 37144 + ... + 37509.

It is an arithmetic number, because the mean of its divisors is an integer number (2314274).

Almost surely, 2^13661499 is an apocalyptic number.

13661499 is a deficient number, since it is larger than the sum of its proper divisors (4852693).

13661499 is an equidigital number, since it uses as much as digits as its factorization.

13661499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74717.

The product of its digits is 34992, while the sum is 39.

The square root of 13661499 is about 3696.1465068365. The cubic root of 13661499 is about 239.0558916453.

The spelling of 13661499 in words is "thirteen million, six hundred sixty-one thousand, four hundred ninety-nine".