13726646 has 4 divisors (see below), whose sum is σ = 20589972. Its totient is φ = 6863322.

The previous prime is 13726639. The next prime is 13726649. The reversal of 13726646 is 64662731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64662731 = 7 ⋅9237533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13726649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3431660 + ... + 3431663.

It is an arithmetic number, because the mean of its divisors is an integer number (5147493).

Almost surely, 2^13726646 is an apocalyptic number.

13726646 is a deficient number, since it is larger than the sum of its proper divisors (6863326).

13726646 is an equidigital number, since it uses as much as digits as its factorization.

13726646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6863325.

The product of its digits is 36288, while the sum is 35.

The square root of 13726646 is about 3704.9488525484. The cubic root of 13726646 is about 239.4352810573.

The spelling of 13726646 in words is "thirteen million, seven hundred twenty-six thousand, six hundred forty-six".