408847987 has 4 divisors (see below), whose sum is σ = 411969096. Its totient is φ = 405726880.

The previous prime is 408847981. The next prime is 408848009. The reversal of 408847987 is 789748804.

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 408847987 - 2²³ = 400459379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (408847981) 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, 1560358 + ... + 1560619.

It is an arithmetic number, because the mean of its divisors is an integer number (102992274).

Almost surely, 2^408847987 is an apocalyptic number.

408847987 is a deficient number, since it is larger than the sum of its proper divisors (3121109).

408847987 is a wasteful number, since it uses less digits than its factorization.

408847987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3121108.

The product of its (nonzero) digits is 3612672, while the sum is 55.

The square root of 408847987 is about 20219.9897873367. The cubic root of 408847987 is about 742.1994381832.

The spelling of 408847987 in words is "four hundred eight million, eight hundred forty-seven thousand, nine hundred eighty-seven".