13639193 has 4 divisors (see below), whose sum is σ = 14109540. Its totient is φ = 13168848.

The previous prime is 13639189. The next prime is 13639201. The reversal of 13639193 is 39193631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39193631 = 1609 ⋅24359.

It can be written as a sum of positive squares in 2 ways, for example, as 3193369 + 10445824 = 1787^2 + 3232^2 .

It is a cyclic number.

It is not a de Polignac number, because 13639193 - 2² = 13639189 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (13639103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 235130 + ... + 235187.

It is an arithmetic number, because the mean of its divisors is an integer number (3527385).

Almost surely, 2^13639193 is an apocalyptic number.

It is an amenable number.

13639193 is a deficient number, since it is larger than the sum of its proper divisors (470347).

13639193 is an equidigital number, since it uses as much as digits as its factorization.

13639193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470346.

The product of its digits is 13122, while the sum is 35.

The square root of 13639193 is about 3693.1278071575. The cubic root of 13639193 is about 238.9257135068.

The spelling of 13639193 in words is "thirteen million, six hundred thirty-nine thousand, one hundred ninety-three".