13687193 has 8 divisors (see below), whose sum is σ = 15607368. Its totient is φ = 11890944.

The previous prime is 13687189. The next prime is 13687207. The reversal of 13687193 is 39178631.

13687193 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1317904 + 12369289 = 1148^2 + 3517^2 .

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

It is not a de Polignac number, because 13687193 - 2² = 13687189 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13687123) 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, 30746 + ... + 31187.

It is an arithmetic number, because the mean of its divisors is an integer number (1950921).

Almost surely, 2^13687193 is an apocalyptic number.

13687193 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

13687193 is a deficient number, since it is larger than the sum of its proper divisors (1920175).

13687193 is a wasteful number, since it uses less digits than its factorization.

13687193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61963.

The product of its digits is 27216, while the sum is 38.

The square root of 13687193 is about 3699.6206562295. The cubic root of 13687193 is about 239.2056667021.

The spelling of 13687193 in words is "thirteen million, six hundred eighty-seven thousand, one hundred ninety-three".