406855679 has 4 divisors (see below), whose sum is σ = 430788384. Its totient is φ = 382922976.

The previous prime is 406855643. The next prime is 406855697. The reversal of 406855679 is 976558604.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-406855679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406855619) 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, 11966327 + ... + 11966360.

It is an arithmetic number, because the mean of its divisors is an integer number (107697096).

Almost surely, 2^406855679 is an apocalyptic number.

406855679 is a deficient number, since it is larger than the sum of its proper divisors (23932705).

406855679 is a wasteful number, since it uses less digits than its factorization.

406855679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23932704.

The product of its (nonzero) digits is 1814400, while the sum is 50.

The square root of 406855679 is about 20170.6638215008. The cubic root of 406855679 is about 740.9919003172.

It can be divided in two parts, 40685 and 5679, that added together give a palindrome (46364).

The spelling of 406855679 in words is "four hundred six million, eight hundred fifty-five thousand, six hundred seventy-nine".