123313403 has 2 divisors, whose sum is σ = 123313404. Its totient is φ = 123313402.

The previous prime is 123313367. The next prime is 123313409. The reversal of 123313403 is 304313321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123313403 - 2²⁰ = 122264827 is a prime.

It is not a weakly prime, because it can be changed into another prime (123313409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61656701 + 61656702.

It is an arithmetic number, because the mean of its divisors is an integer number (61656702).

Almost surely, 2^123313403 is an apocalyptic number.

123313403 is a deficient number, since it is larger than the sum of its proper divisors (1).

123313403 is an equidigital number, since it uses as much as digits as its factorization.

123313403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 123313403 is about 11104.6568159489. The cubic root of 123313403 is about 497.7410133286.

Adding to 123313403 its reverse (304313321), we get a palindrome (427626724).

The spelling of 123313403 in words is "one hundred twenty-three million, three hundred thirteen thousand, four hundred three".