408685109 has 8 divisors (see below), whose sum is σ = 471434688. Its totient is φ = 347027040.

The previous prime is 408685099. The next prime is 408685141. The reversal of 408685109 is 901586804.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 408685109 - 2⁸ = 408684853 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 (408685169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 272072 + ... + 273569.

It is an arithmetic number, because the mean of its divisors is an integer number (58929336).

Almost surely, 2^408685109 is an apocalyptic number.

It is an amenable number.

408685109 is a deficient number, since it is larger than the sum of its proper divisors (62749579).

408685109 is a wasteful number, since it uses less digits than its factorization.

408685109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545755.

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 408685109 is about 20215.9617381909. The cubic root of 408685109 is about 742.1008652655.

The spelling of 408685109 in words is "four hundred eight million, six hundred eighty-five thousand, one hundred nine".