406709 has 4 divisors (see below), whose sum is σ = 424416. Its totient is φ = 389004.

The previous prime is 406699. The next prime is 406717. The reversal of 406709 is 907604.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 406709 - 2¹² = 402613 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8819 + ... + 8864.

It is an arithmetic number, because the mean of its divisors is an integer number (106104).

2⁴⁰⁶⁷⁰⁹ is an apocalyptic number.

It is an amenable number.

406709 is a deficient number, since it is larger than the sum of its proper divisors (17707).

406709 is a wasteful number, since it uses less digits than its factorization.

406709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17706.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 406709 is about 637.7374067749. The cubic root of 406709 is about 74.0902842517.

The spelling of 406709 in words is "four hundred six thousand, seven hundred nine".