13638273 has 12 divisors (see below), whose sum is σ = 19988304. Its totient is φ = 8265400.

The previous prime is 13638269. The next prime is 13638277. The reversal of 13638273 is 37283631.

It is an interprime number because it is at equal distance from previous prime (13638269) and next prime (13638277).

It is not a de Polignac number, because 13638273 - 2² = 13638269 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (13638277) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18423 + ... + 19148.

It is an arithmetic number, because the mean of its divisors is an integer number (1665692).

Almost surely, 2^13638273 is an apocalyptic number.

It is an amenable number.

13638273 is a deficient number, since it is larger than the sum of its proper divisors (6350031).

13638273 is a wasteful number, since it uses less digits than its factorization.

13638273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37596 (or 37585 counting only the distinct ones).

The product of its digits is 18144, while the sum is 33.

The square root of 13638273 is about 3693.0032493893. The cubic root of 13638273 is about 238.9203413268.

The spelling of 13638273 in words is "thirteen million, six hundred thirty-eight thousand, two hundred seventy-three".