409723663 has 4 divisors (see below), whose sum is σ = 410000320. Its totient is φ = 409447008.

The previous prime is 409723637. The next prime is 409723703. The reversal of 409723663 is 366327904.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 409723663 - 2²¹ = 407626511 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 (409723603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136095 + ... + 139072.

It is an arithmetic number, because the mean of its divisors is an integer number (102500080).

Almost surely, 2^409723663 is an apocalyptic number.

409723663 is a deficient number, since it is larger than the sum of its proper divisors (276657).

409723663 is a wasteful number, since it uses less digits than its factorization.

409723663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276656.

The product of its (nonzero) digits is 163296, while the sum is 40.

The square root of 409723663 is about 20241.6319253167. The cubic root of 409723663 is about 742.7289445036.

The spelling of 409723663 in words is "four hundred nine million, seven hundred twenty-three thousand, six hundred sixty-three".