383666987 has 8 divisors (see below), whose sum is σ = 419549760. Its totient is φ = 347951560.

The previous prime is 383666957. The next prime is 383667017. The reversal of 383666987 is 789666383.

It is an interprime number because it is at equal distance from previous prime (383666957) and next prime (383667017).

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

It is not a de Polignac number, because 383666987 - 2²² = 379472683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (383666917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37013 + ... + 46230.

It is an arithmetic number, because the mean of its divisors is an integer number (52443720).

Almost surely, 2^383666987 is an apocalyptic number.

383666987 is a deficient number, since it is larger than the sum of its proper divisors (35882773).

383666987 is a wasteful number, since it uses less digits than its factorization.

383666987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83673.

The product of its digits is 7838208, while the sum is 56.

The square root of 383666987 is about 19587.4191000244. The cubic root of 383666987 is about 726.6380635947.

The spelling of 383666987 in words is "three hundred eighty-three million, six hundred sixty-six thousand, nine hundred eighty-seven".