1623123643 has 2 divisors, whose sum is σ = 1623123644. Its totient is φ = 1623123642.

The previous prime is 1623123629. The next prime is 1623123647. The reversal of 1623123643 is 3463213261.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1623123643 - 2⁵ = 1623123611 is a prime.

It is not a weakly prime, because it can be changed into another prime (1623123647) 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, 811561821 + 811561822.

It is an arithmetic number, because the mean of its divisors is an integer number (811561822).

Almost surely, 2^1623123643 is an apocalyptic number.

1623123643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1623123643 is an equidigital number, since it uses as much as digits as its factorization.

1623123643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 31.

The square root of 1623123643 is about 40288.0086750388. The cubic root of 1623123643 is about 1175.2146625763.

The spelling of 1623123643 in words is "one billion, six hundred twenty-three million, one hundred twenty-three thousand, six hundred forty-three".