409265663 has 2 divisors, whose sum is σ = 409265664. Its totient is φ = 409265662.

The previous prime is 409265641. The next prime is 409265677. The reversal of 409265663 is 366562904.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-409265663 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 409265663.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (409265683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204632831 + 204632832.

It is an arithmetic number, because the mean of its divisors is an integer number (204632832).

Almost surely, 2^409265663 is an apocalyptic number.

409265663 is a deficient number, since it is larger than the sum of its proper divisors (1).

409265663 is an equidigital number, since it uses as much as digits as its factorization.

409265663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 41.

The square root of 409265663 is about 20230.3154448961. The cubic root of 409265663 is about 742.4520939363.

The spelling of 409265663 in words is "four hundred nine million, two hundred sixty-five thousand, six hundred sixty-three".