406646111 has 2 divisors, whose sum is σ = 406646112. Its totient is φ = 406646110.

The previous prime is 406646087. The next prime is 406646147. The reversal of 406646111 is 111646604.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 406646111 - 2⁶ = 406646047 is a prime.

It is a super-2 number, since 2×406646111² = 330722119182848642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (406642111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203323055 + 203323056.

It is an arithmetic number, because the mean of its divisors is an integer number (203323056).

Almost surely, 2^406646111 is an apocalyptic number.

406646111 is a deficient number, since it is larger than the sum of its proper divisors (1).

406646111 is an equidigital number, since it uses as much as digits as its factorization.

406646111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 406646111 is about 20165.4682811979. The cubic root of 406646111 is about 740.8646521972.

The spelling of 406646111 in words is "four hundred six million, six hundred forty-six thousand, one hundred eleven".