123420403 has 2 divisors, whose sum is σ = 123420404. Its totient is φ = 123420402.

The previous prime is 123420383. The next prime is 123420431. The reversal of 123420403 is 304024321.

It is a weak prime.

It is an emirp because it is prime and its reverse (304024321) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123420403 is a prime.

It is not a weakly prime, because it can be changed into another prime (123420203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61710201 + 61710202.

It is an arithmetic number, because the mean of its divisors is an integer number (61710202).

Almost surely, 2^123420403 is an apocalyptic number.

123420403 is a deficient number, since it is larger than the sum of its proper divisors (1).

123420403 is an equidigital number, since it uses as much as digits as its factorization.

123420403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 123420403 is about 11109.4735698862. The cubic root of 123420403 is about 497.8849362933.

Adding to 123420403 its reverse (304024321), we get a palindrome (427444724).

The spelling of 123420403 in words is "one hundred twenty-three million, four hundred twenty thousand, four hundred three".