406220911 has 2 divisors, whose sum is σ = 406220912. Its totient is φ = 406220910.

The previous prime is 406220909. The next prime is 406220929. The reversal of 406220911 is 119022604.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 406220911 - 2¹ = 406220909 is a prime.

Together with 406220909, it forms a pair of twin primes.

It is equal to p_21650317 and since 406220911 and 21650317 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (406220611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203110455 + 203110456.

It is an arithmetic number, because the mean of its divisors is an integer number (203110456).

Almost surely, 2^406220911 is an apocalyptic number.

406220911 is a deficient number, since it is larger than the sum of its proper divisors (1).

406220911 is an equidigital number, since it uses as much as digits as its factorization.

406220911 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 406220911 is about 20154.9227485495. The cubic root of 406220911 is about 740.6063395418.

The spelling of 406220911 in words is "four hundred six million, two hundred twenty thousand, nine hundred eleven".