406979 has 4 divisors (see below), whose sum is σ = 409584. Its totient is φ = 404376.

The previous prime is 406969. The next prime is 406981. The reversal of 406979 is 979604.

It is a happy number.

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 406979 - 2¹⁶ = 341443 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 406979.

It is not an unprimeable number, because it can be changed into a prime (406969) 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, 1052 + ... + 1385.

It is an arithmetic number, because the mean of its divisors is an integer number (102396).

2⁴⁰⁶⁹⁷⁹ is an apocalyptic number.

406979 is a deficient number, since it is larger than the sum of its proper divisors (2605).

406979 is a wasteful number, since it uses less digits than its factorization.

406979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2604.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 406979 is about 637.9490575273. The cubic root of 406979 is about 74.1066759484.

The spelling of 406979 in words is "four hundred six thousand, nine hundred seventy-nine".