123415399 has 2 divisors, whose sum is σ = 123415400. Its totient is φ = 123415398.

The previous prime is 123415381. The next prime is 123415403. The reversal of 123415399 is 993514321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123415399 - 2²¹ = 121318247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123415379) 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, 61707699 + 61707700.

It is an arithmetic number, because the mean of its divisors is an integer number (61707700).

Almost surely, 2^123415399 is an apocalyptic number.

123415399 is a deficient number, since it is larger than the sum of its proper divisors (1).

123415399 is an equidigital number, since it uses as much as digits as its factorization.

123415399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29160, while the sum is 37.

The square root of 123415399 is about 11109.2483544117. The cubic root of 123415399 is about 497.8782073954.

The spelling of 123415399 in words is "one hundred twenty-three million, four hundred fifteen thousand, three hundred ninety-nine".