13138366 has 4 divisors (see below), whose sum is σ = 19707552. Its totient is φ = 6569182.

The previous prime is 13138357. The next prime is 13138369. The reversal of 13138366 is 66383131.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×13138366² = 345233322299912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13138369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3284590 + ... + 3284593.

It is an arithmetic number, because the mean of its divisors is an integer number (4926888).

Almost surely, 2^13138366 is an apocalyptic number.

13138366 is a deficient number, since it is larger than the sum of its proper divisors (6569186).

13138366 is an equidigital number, since it uses as much as digits as its factorization.

13138366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6569185.

The product of its digits is 7776, while the sum is 31.

The square root of 13138366 is about 3624.6884004008. The cubic root of 13138366 is about 235.9647438476.

The spelling of 13138366 in words is "thirteen million, one hundred thirty-eight thousand, three hundred sixty-six".