123404263 has 2 divisors, whose sum is σ = 123404264. Its totient is φ = 123404262.

The previous prime is 123404261. The next prime is 123404279. The reversal of 123404263 is 362404321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123404263 - 2¹ = 123404261 is a prime.

It is a super-2 number, since 2×123404263² = 30457224253146338, which contains 22 as substring.

Together with 123404261, 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 (123404261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61702131 + 61702132.

It is an arithmetic number, because the mean of its divisors is an integer number (61702132).

Almost surely, 2^123404263 is an apocalyptic number.

123404263 is a deficient number, since it is larger than the sum of its proper divisors (1).

123404263 is an equidigital number, since it uses as much as digits as its factorization.

123404263 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 123404263 is about 11108.7471390792. The cubic root of 123404263 is about 497.8632321207.

Adding to 123404263 its reverse (362404321), we get a palindrome (485808584).

The spelling of 123404263 in words is "one hundred twenty-three million, four hundred four thousand, two hundred sixty-three".