123422643 has 16 divisors (see below), whose sum is σ = 185580160. Its totient is φ = 81052488.

The previous prime is 123422617. The next prime is 123422647. The reversal of 123422643 is 346224321.

123422643 is a `hidden beast` number, since 12 + 3 + 4 + 2 + 2 + 643 = 666.

It is not a de Polignac number, because 123422643 - 2¹³ = 123414451 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123422647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32305 + ... + 35922.

It is an arithmetic number, because the mean of its divisors is an integer number (11598760).

Almost surely, 2^123422643 is an apocalyptic number.

123422643 is a deficient number, since it is larger than the sum of its proper divisors (62157517).

123422643 is an equidigital number, since it uses as much as digits as its factorization.

123422643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68303 (or 68297 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

The square root of 123422643 is about 11109.5743842867. The cubic root of 123422643 is about 497.8879483710.

Adding to 123422643 its reverse (346224321), we get a palindrome (469646964).

The spelling of 123422643 in words is "one hundred twenty-three million, four hundred twenty-two thousand, six hundred forty-three".