13812649 has 4 divisors (see below), whose sum is σ = 13832080. Its totient is φ = 13793220.

The previous prime is 13812607. The next prime is 13812661. The reversal of 13812649 is 94621831.

13812649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94621831 = 173 ⋅546947.

It is a cyclic number.

It is not a de Polignac number, because 13812649 - 2⁷ = 13812521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13812349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8607 + ... + 10084.

It is an arithmetic number, because the mean of its divisors is an integer number (3458020).

Almost surely, 2^13812649 is an apocalyptic number.

It is an amenable number.

13812649 is a deficient number, since it is larger than the sum of its proper divisors (19431).

13812649 is an equidigital number, since it uses as much as digits as its factorization.

13812649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19430.

The product of its digits is 10368, while the sum is 34.

The square root of 13812649 is about 3716.5372324248. The cubic root of 13812649 is about 239.9342933552.

The spelling of 13812649 in words is "thirteen million, eight hundred twelve thousand, six hundred forty-nine".