1344786621 has 4 divisors (see below), whose sum is σ = 1793048832. Its totient is φ = 896524412.

The previous prime is 1344786557. The next prime is 1344786629. The reversal of 1344786621 is 1266874431.

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 1344786621 - 2⁶ = 1344786557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1344786629) 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, 224131101 + ... + 224131106.

It is an arithmetic number, because the mean of its divisors is an integer number (448262208).

Almost surely, 2^1344786621 is an apocalyptic number.

It is an amenable number.

1344786621 is a deficient number, since it is larger than the sum of its proper divisors (448262211).

1344786621 is an equidigital number, since it uses as much as digits as its factorization.

1344786621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448262210.

The product of its digits is 193536, while the sum is 42.

The square root of 1344786621 is about 36671.3324137534. The cubic root of 1344786621 is about 1103.7849289287.

The spelling of 1344786621 in words is "one billion, three hundred forty-four million, seven hundred eighty-six thousand, six hundred twenty-one".