123423403 has 2 divisors, whose sum is σ = 123423404. Its totient is φ = 123423402.

The previous prime is 123423401. The next prime is 123423413. The reversal of 123423403 is 304324321.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123423403 - 2¹ = 123423401 is a prime.

Together with 123423401, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (123423401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61711701 + 61711702.

It is an arithmetic number, because the mean of its divisors is an integer number (61711702).

Almost surely, 2^123423403 is an apocalyptic number.

123423403 is a deficient number, since it is larger than the sum of its proper divisors (1).

123423403 is an equidigital number, since it uses as much as digits as its factorization.

123423403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 123423403 is about 11109.6085889648. The cubic root of 123423403 is about 497.8889703176. Note that the first 3 decimals are identical.

Adding to 123423403 its reverse (304324321), we get a palindrome (427747724).

The spelling of 123423403 in words is "one hundred twenty-three million, four hundred twenty-three thousand, four hundred three".