406421911 has 4 divisors (see below), whose sum is σ = 464482192. Its totient is φ = 348361632.

The previous prime is 406421893. The next prime is 406421923. The reversal of 406421911 is 119124604.

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 406421911 - 2¹¹ = 406419863 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 406421911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406421311) 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, 29030130 + ... + 29030143.

It is an arithmetic number, because the mean of its divisors is an integer number (116120548).

Almost surely, 2^406421911 is an apocalyptic number.

406421911 is a deficient number, since it is larger than the sum of its proper divisors (58060281).

406421911 is an equidigital number, since it uses as much as digits as its factorization.

406421911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58060280.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 406421911 is about 20159.9085067368. The cubic root of 406421911 is about 740.7284712231.

The spelling of 406421911 in words is "four hundred six million, four hundred twenty-one thousand, nine hundred eleven".