406899943 has 4 divisors (see below), whose sum is σ = 410633080. Its totient is φ = 403166808.

The previous prime is 406899937. The next prime is 406899967. The reversal of 406899943 is 349998604.

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 406899943 - 2⁹ = 406899431 is a prime.

It is a super-2 number, since 2×406899943² = 331135127226806498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406899343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1866405 + ... + 1866622.

It is an arithmetic number, because the mean of its divisors is an integer number (102658270).

Almost surely, 2^406899943 is an apocalyptic number.

406899943 is a deficient number, since it is larger than the sum of its proper divisors (3733137).

406899943 is a wasteful number, since it uses less digits than its factorization.

406899943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3733136.

The product of its (nonzero) digits is 1679616, while the sum is 52.

The square root of 406899943 is about 20171.7610287253. The cubic root of 406899943 is about 741.0187714968.

The spelling of 406899943 in words is "four hundred six million, eight hundred ninety-nine thousand, nine hundred forty-three".