123040403 has 2 divisors, whose sum is σ = 123040404. Its totient is φ = 123040402.

The previous prime is 123040343. The next prime is 123040427. The reversal of 123040403 is 304040321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123040403 - 2¹² = 123036307 is a prime.

It is not a weakly prime, because it can be changed into another prime (123040433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61520201 + 61520202.

It is an arithmetic number, because the mean of its divisors is an integer number (61520202).

Almost surely, 2^123040403 is an apocalyptic number.

123040403 is a deficient number, since it is larger than the sum of its proper divisors (1).

123040403 is an equidigital number, since it uses as much as digits as its factorization.

123040403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 123040403 is about 11092.3578647644. The cubic root of 123040403 is about 497.3734304250.

Adding to 123040403 its reverse (304040321), we get a palindrome (427080724).

The spelling of 123040403 in words is "one hundred twenty-three million, forty thousand, four hundred three".