409009685 has 8 divisors (see below), whose sum is σ = 560927616. Its totient is φ = 280463760.

The previous prime is 409009673. The next prime is 409009687. The reversal of 409009685 is 586900904.

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

It is not a de Polignac number, because 409009685 - 2²⁴ = 392232469 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 (409009687) 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, 5842961 + ... + 5843030.

It is an arithmetic number, because the mean of its divisors is an integer number (70115952).

Almost surely, 2^409009685 is an apocalyptic number.

It is an amenable number.

409009685 is a deficient number, since it is larger than the sum of its proper divisors (151917931).

409009685 is a wasteful number, since it uses less digits than its factorization.

409009685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11686003.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 409009685 is about 20223.9878609536. The cubic root of 409009685 is about 742.2972710783.

The spelling of 409009685 in words is "four hundred nine million, nine thousand, six hundred eighty-five".