409679687 has 4 divisors (see below), whose sum is σ = 409785936. Its totient is φ = 409573440.

The previous prime is 409679681. The next prime is 409679707. The reversal of 409679687 is 786976904.

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 409679687 - 2⁶ = 409679623 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 (409679681) 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, 47114 + ... + 55127.

It is an arithmetic number, because the mean of its divisors is an integer number (102446484).

Almost surely, 2^409679687 is an apocalyptic number.

409679687 is a deficient number, since it is larger than the sum of its proper divisors (106249).

409679687 is a wasteful number, since it uses less digits than its factorization.

409679687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106248.

The product of its (nonzero) digits is 4572288, while the sum is 56.

The square root of 409679687 is about 20240.5456201161. The cubic root of 409679687 is about 742.7023709699.

The spelling of 409679687 in words is "four hundred nine million, six hundred seventy-nine thousand, six hundred eighty-seven".