406806688999 has 4 divisors (see below), whose sum is σ = 406817135280. Its totient is φ = 406796242720.

The previous prime is 406806688987. The next prime is 406806689017. The reversal of 406806688999 is 999886608604.

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 406806688999 - 2¹³ = 406806680807 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 (406806688979) 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, 5164507 + ... + 5242684.

It is an arithmetic number, because the mean of its divisors is an integer number (101704283820).

Almost surely, 2^406806688999 is an apocalyptic number.

406806688999 is a deficient number, since it is larger than the sum of its proper divisors (10446281).

406806688999 is a wasteful number, since it uses less digits than its factorization.

406806688999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10446280.

The product of its (nonzero) digits is 322486272, while the sum is 73.

The spelling of 406806688999 in words is "four hundred six billion, eight hundred six million, six hundred eighty-eight thousand, nine hundred ninety-nine".