1344640173 has 4 divisors (see below), whose sum is σ = 1792853568. Its totient is φ = 896426780.

The previous prime is 1344640163. The next prime is 1344640181. The reversal of 1344640173 is 3710464431.

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 a cyclic number.

It is not a de Polignac number, because 1344640173 - 2²⁰ = 1343591597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1344640123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 224106693 + ... + 224106698.

It is an arithmetic number, because the mean of its divisors is an integer number (448213392).

Almost surely, 2^1344640173 is an apocalyptic number.

It is an amenable number.

1344640173 is a deficient number, since it is larger than the sum of its proper divisors (448213395).

1344640173 is an equidigital number, since it uses as much as digits as its factorization.

1344640173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448213394.

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 1344640173 is about 36669.3355952900. The cubic root of 1344640173 is about 1103.7448598796.

The spelling of 1344640173 in words is "one billion, three hundred forty-four million, six hundred forty thousand, one hundred seventy-three".