409135123 has 2 divisors, whose sum is σ = 409135124. Its totient is φ = 409135122.

The previous prime is 409135093. The next prime is 409135127. The reversal of 409135123 is 321531904.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 409135123 - 2⁹ = 409134611 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 409135091 and 409135100.

It is not a weakly prime, because it can be changed into another prime (409135127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204567561 + 204567562.

It is an arithmetic number, because the mean of its divisors is an integer number (204567562).

Almost surely, 2^409135123 is an apocalyptic number.

409135123 is a deficient number, since it is larger than the sum of its proper divisors (1).

409135123 is an equidigital number, since it uses as much as digits as its factorization.

409135123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 409135123 is about 20227.0888414522. The cubic root of 409135123 is about 742.3731476581.

The spelling of 409135123 in words is "four hundred nine million, one hundred thirty-five thousand, one hundred twenty-three".