409800987 has 12 divisors (see below), whose sum is σ = 623089480. Its totient is φ = 258821568.

The previous prime is 409800983. The next prime is 409800991. The reversal of 409800987 is 789008904.

It is an interprime number because it is at equal distance from previous prime (409800983) and next prime (409800991).

It is not a de Polignac number, because 409800987 - 2² = 409800983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (409800983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1198078 + ... + 1198419.

Almost surely, 2^409800987 is an apocalyptic number.

409800987 is a deficient number, since it is larger than the sum of its proper divisors (213288493).

409800987 is a wasteful number, since it uses less digits than its factorization.

409800987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2396522 (or 2396519 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 409800987 is about 20243.5418590720. The cubic root of 409800987 is about 742.7756647411.

The spelling of 409800987 in words is "four hundred nine million, eight hundred thousand, nine hundred eighty-seven".