409687663 has 16 divisors (see below), whose sum is σ = 511271424. Its totient is φ = 318929760.

The previous prime is 409687639. The next prime is 409687667. The reversal of 409687663 is 366786904.

It is a cyclic number.

It is not a de Polignac number, because 409687663 - 2⁵ = 409687631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409687667) 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 in 15 ways as a sum of consecutive naturals, for example, 109581 + ... + 113257.

It is an arithmetic number, because the mean of its divisors is an integer number (31954464).

Almost surely, 2^409687663 is an apocalyptic number.

409687663 is a deficient number, since it is larger than the sum of its proper divisors (101583761).

409687663 is a wasteful number, since it uses less digits than its factorization.

409687663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5142.

The product of its (nonzero) digits is 1306368, while the sum is 49.

The square root of 409687663 is about 20240.7426494188. The cubic root of 409687663 is about 742.7071907970.

The spelling of 409687663 in words is "four hundred nine million, six hundred eighty-seven thousand, six hundred sixty-three".