1421644339 has 2 divisors, whose sum is σ = 1421644340. Its totient is φ = 1421644338.

The previous prime is 1421644337. The next prime is 1421644349. The reversal of 1421644339 is 9334461241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1421644339 - 2¹ = 1421644337 is a prime.

It is a super-2 number, since 2×1421644339² = 4042145253221493842, which contains 22 as substring.

Together with 1421644337, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1421644298 and 1421644307.

It is not a weakly prime, because it can be changed into another prime (1421644337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710822169 + 710822170.

It is an arithmetic number, because the mean of its divisors is an integer number (710822170).

Almost surely, 2^1421644339 is an apocalyptic number.

1421644339 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421644339 is an equidigital number, since it uses as much as digits as its factorization.

1421644339 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 37.

The square root of 1421644339 is about 37704.6991633669. The cubic root of 1421644339 is about 1124.4245521890.

The spelling of 1421644339 in words is "one billion, four hundred twenty-one million, six hundred forty-four thousand, three hundred thirty-nine".