13440549 has 4 divisors (see below), whose sum is σ = 17920736. Its totient is φ = 8960364.

The previous prime is 13440547. The next prime is 13440551. The reversal of 13440549 is 94504431.

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.

It is an interprime number because it is at equal distance from previous prime (13440547) and next prime (13440551).

It is not a de Polignac number, because 13440549 - 2¹ = 13440547 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13440547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2240089 + ... + 2240094.

It is an arithmetic number, because the mean of its divisors is an integer number (4480184).

Almost surely, 2^13440549 is an apocalyptic number.

It is an amenable number.

13440549 is a deficient number, since it is larger than the sum of its proper divisors (4480187).

13440549 is an equidigital number, since it uses as much as digits as its factorization.

13440549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4480186.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 13440549 is about 3666.1354312136. The cubic root of 13440549 is about 237.7601153811.

The spelling of 13440549 in words is "thirteen million, four hundred forty thousand, five hundred forty-nine".