13822649 has 4 divisors (see below), whose sum is σ = 14635764. Its totient is φ = 13009536.

The previous prime is 13822639. The next prime is 13822657. The reversal of 13822649 is 94622831.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12730624 + 1092025 = 3568^2 + 1045^2 .

It is a cyclic number.

It is not a de Polignac number, because 13822649 - 2¹⁶ = 13757113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13822619) 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, 406532 + ... + 406565.

It is an arithmetic number, because the mean of its divisors is an integer number (3658941).

Almost surely, 2^13822649 is an apocalyptic number.

It is an amenable number.

13822649 is a deficient number, since it is larger than the sum of its proper divisors (813115).

13822649 is an equidigital number, since it uses as much as digits as its factorization.

13822649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813114.

The product of its digits is 20736, while the sum is 35.

The square root of 13822649 is about 3717.8823273471. The cubic root of 13822649 is about 239.9921814583.

The spelling of 13822649 in words is "thirteen million, eight hundred twenty-two thousand, six hundred forty-nine".