409241687 has 4 divisors (see below), whose sum is σ = 409336200. Its totient is φ = 409147176.

The previous prime is 409241681. The next prime is 409241711. The reversal of 409241687 is 786142904.

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 409241687 - 2⁴ = 409241671 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 (409241681) 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, 40433 + ... + 49530.

It is an arithmetic number, because the mean of its divisors is an integer number (102334050).

Almost surely, 2^409241687 is an apocalyptic number.

409241687 is a deficient number, since it is larger than the sum of its proper divisors (94513).

409241687 is an equidigital number, since it uses as much as digits as its factorization.

409241687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94512.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 409241687 is about 20229.7228601877. The cubic root of 409241687 is about 742.4375953024.

The spelling of 409241687 in words is "four hundred nine million, two hundred forty-one thousand, six hundred eighty-seven".