406099903 has 4 divisors (see below), whose sum is σ = 443018088. Its totient is φ = 369181720.

The previous prime is 406099877. The next prime is 406099913. The reversal of 406099903 is 309990604.

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 406099903 - 2¹³ = 406091711 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406099913) 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 3 ways as a sum of consecutive naturals, for example, 18459076 + ... + 18459097.

It is an arithmetic number, because the mean of its divisors is an integer number (110754522).

Almost surely, 2^406099903 is an apocalyptic number.

406099903 is a deficient number, since it is larger than the sum of its proper divisors (36918185).

406099903 is a wasteful number, since it uses less digits than its factorization.

406099903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36918184.

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 406099903 is about 20151.9205784461. The cubic root of 406099903 is about 740.5327931948.

The spelling of 406099903 in words is "four hundred six million, ninety-nine thousand, nine hundred three".