1405644223 has 2 divisors, whose sum is σ = 1405644224. Its totient is φ = 1405644222.

The previous prime is 1405644221. The next prime is 1405644277. The reversal of 1405644223 is 3224465041.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1405644223 - 2¹ = 1405644221 is a prime.

Together with 1405644221, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1405644221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 702822111 + 702822112.

It is an arithmetic number, because the mean of its divisors is an integer number (702822112).

Almost surely, 2^1405644223 is an apocalyptic number.

1405644223 is a deficient number, since it is larger than the sum of its proper divisors (1).

1405644223 is an equidigital number, since it uses as much as digits as its factorization.

1405644223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 1405644223 is about 37491.9221033011. The cubic root of 1405644223 is about 1120.1902905309.

The spelling of 1405644223 in words is "one billion, four hundred five million, six hundred forty-four thousand, two hundred twenty-three".