406699 has 2 divisors, whose sum is σ = 406700. Its totient is φ = 406698.

The previous prime is 406697. The next prime is 406717. The reversal of 406699 is 996604.

406699 is an esthetic number in base 9, because in such base its adjacent digits differ by 1.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 406699 - 2¹ = 406697 is a prime.

Together with 406697, it forms a pair of twin primes.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 406699.

It is not a weakly prime, because it can be changed into another prime (406697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203349 + 203350.

It is an arithmetic number, because the mean of its divisors is an integer number (203350).

2⁴⁰⁶⁶⁹⁹ is an apocalyptic number.

406699 is a deficient number, since it is larger than the sum of its proper divisors (1).

406699 is an equidigital number, since it uses as much as digits as its factorization.

406699 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 406699 is about 637.7295665092. The cubic root of 406699 is about 74.0896770126.

The spelling of 406699 in words is "four hundred six thousand, six hundred ninety-nine".