13641723 has 16 divisors (see below), whose sum is σ = 20593440. Its totient is φ = 8921952.

The previous prime is 13641721. The next prime is 13641739. The reversal of 13641723 is 32714631.

13641723 is a `hidden beast` number, since 13 + 641 + 7 + 2 + 3 = 666.

It is not a de Polignac number, because 13641723 - 2¹ = 13641721 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (13641721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3336 + ... + 6197.

It is an arithmetic number, because the mean of its divisors is an integer number (1287090).

Almost surely, 2^13641723 is an apocalyptic number.

13641723 is a deficient number, since it is larger than the sum of its proper divisors (6951717).

13641723 is an equidigital number, since it uses as much as digits as its factorization.

13641723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9595 (or 9589 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 13641723 is about 3693.4703193609. The cubic root of 13641723 is about 238.9404857562.

The spelling of 13641723 in words is "thirteen million, six hundred forty-one thousand, seven hundred twenty-three".