406611999 has 24 divisors (see below), whose sum is σ = 602281680. Its totient is φ = 264200832.

The previous prime is 406611979. The next prime is 406612021. The reversal of 406611999 is 999116604.

It is not a de Polignac number, because 406611999 - 2¹⁵ = 406579231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406611949) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 251907 + ... + 253515.

It is an arithmetic number, because the mean of its divisors is an integer number (25095070).

Almost surely, 2^406611999 is an apocalyptic number.

406611999 is a deficient number, since it is larger than the sum of its proper divisors (195669681).

406611999 is a wasteful number, since it uses less digits than its factorization.

406611999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2311 (or 2308 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 406611999 is about 20164.6224611323. The cubic root of 406611999 is about 740.8439355093.

The spelling of 406611999 in words is "four hundred six million, six hundred eleven thousand, nine hundred ninety-nine".