406523979 has 12 divisors (see below), whose sum is σ = 601523832. Its totient is φ = 264405600.

The previous prime is 406523963. The next prime is 406523989. The reversal of 406523979 is 979325604.

It is a happy number.

406523979 is a `hidden beast` number, since 406 + 5 + 239 + 7 + 9 = 666.

It is not a de Polignac number, because 406523979 - 2⁴ = 406523963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (406523959) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 550477 + ... + 551214.

It is an arithmetic number, because the mean of its divisors is an integer number (50126986).

Almost surely, 2^406523979 is an apocalyptic number.

406523979 is a deficient number, since it is larger than the sum of its proper divisors (194999853).

406523979 is a wasteful number, since it uses less digits than its factorization.

406523979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101738 (or 1101735 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The square root of 406523979 is about 20162.4398077217. The cubic root of 406523979 is about 740.7904743971.

The spelling of 406523979 in words is "four hundred six million, five hundred twenty-three thousand, nine hundred seventy-nine".