403403123 has 2 divisors, whose sum is σ = 403403124. Its totient is φ = 403403122.

The previous prime is 403403113. The next prime is 403403131. The reversal of 403403123 is 321304304.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 403403123 - 2¹⁰ = 403402099 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 403403095 and 403403104.

It is not a weakly prime, because it can be changed into another prime (403403113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201701561 + 201701562.

It is an arithmetic number, because the mean of its divisors is an integer number (201701562).

Almost surely, 2^403403123 is an apocalyptic number.

403403123 is a deficient number, since it is larger than the sum of its proper divisors (1).

403403123 is an equidigital number, since it uses as much as digits as its factorization.

403403123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 403403123 is about 20084.8978837334. The cubic root of 403403123 is about 738.8899371781.

Adding to 403403123 its reverse (321304304), we get a palindrome (724707427).

The spelling of 403403123 in words is "four hundred three million, four hundred three thousand, one hundred twenty-three".