409838123 has 2 divisors, whose sum is σ = 409838124. Its totient is φ = 409838122.

The previous prime is 409838111. The next prime is 409838153. The reversal of 409838123 is 321838904.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 409838123 - 2¹² = 409834027 is a prime.

It is not a weakly prime, because it can be changed into another prime (409838153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204919061 + 204919062.

It is an arithmetic number, because the mean of its divisors is an integer number (204919062).

Almost surely, 2^409838123 is an apocalyptic number.

409838123 is a deficient number, since it is larger than the sum of its proper divisors (1).

409838123 is an equidigital number, since it uses as much as digits as its factorization.

409838123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 409838123 is about 20244.4590690885. The cubic root of 409838123 is about 742.7981007403.

The spelling of 409838123 in words is "four hundred nine million, eight hundred thirty-eight thousand, one hundred twenty-three".