123415403 has 2 divisors, whose sum is σ = 123415404. Its totient is φ = 123415402.

The previous prime is 123415399. The next prime is 123415423. The reversal of 123415403 is 304514321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123415403 - 2² = 123415399 is a prime.

It is not a weakly prime, because it can be changed into another prime (123415423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61707701 + 61707702.

It is an arithmetic number, because the mean of its divisors is an integer number (61707702).

Almost surely, 2^123415403 is an apocalyptic number.

123415403 is a deficient number, since it is larger than the sum of its proper divisors (1).

123415403 is an equidigital number, since it uses as much as digits as its factorization.

123415403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 123415403 is about 11109.2485344419. The cubic root of 123415403 is about 497.8782127743.

Adding to 123415403 its reverse (304514321), we get a palindrome (427929724).

The spelling of 123415403 in words is "one hundred twenty-three million, four hundred fifteen thousand, four hundred three".