1405444423 has 2 divisors, whose sum is σ = 1405444424. Its totient is φ = 1405444422.

The previous prime is 1405444409. The next prime is 1405444441. The reversal of 1405444423 is 3244445041.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1405444423 - 2²⁵ = 1371889991 is a prime.

It is a super-2 number, since 2×1405444423² = 3950548052283605858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1405444493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 702722211 + 702722212.

It is an arithmetic number, because the mean of its divisors is an integer number (702722212).

Almost surely, 2^1405444423 is an apocalyptic number.

1405444423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1405444423 is an equidigital number, since it uses as much as digits as its factorization.

1405444423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30720, while the sum is 31.

The square root of 1405444423 is about 37489.2574346305. The cubic root of 1405444423 is about 1120.1372129404.

Adding to 1405444423 its reverse (3244445041), we get a palindrome (4649889464).

The spelling of 1405444423 in words is "one billion, four hundred five million, four hundred forty-four thousand, four hundred twenty-three".