1343644421 has 8 divisors (see below), whose sum is σ = 1554095424. Its totient is φ = 1137818880.

The previous prime is 1343644411. The next prime is 1343644433. The reversal of 1343644421 is 1244463431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1343644421 - 2¹⁰ = 1343643397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1343644411) 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 7 ways as a sum of consecutive naturals, for example, 1155740 + ... + 1156901.

It is an arithmetic number, because the mean of its divisors is an integer number (194261928).

Almost surely, 2^1343644421 is an apocalyptic number.

It is an amenable number.

1343644421 is a deficient number, since it is larger than the sum of its proper divisors (210451003).

1343644421 is an equidigital number, since it uses as much as digits as its factorization.

1343644421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2312731.

The product of its digits is 27648, while the sum is 32.

The square root of 1343644421 is about 36655.7556326425. The cubic root of 1343644421 is about 1103.4723390021.

The spelling of 1343644421 in words is "one billion, three hundred forty-three million, six hundred forty-four thousand, four hundred twenty-one".