383987 has 2 divisors, whose sum is σ = 383988. Its totient is φ = 383986.

The previous prime is 383983. The next prime is 384001. The reversal of 383987 is 789383.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 383987 - 2² = 383983 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 383987.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 383987.

It is not a weakly prime, because it can be changed into another prime (383983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 191993 + 191994.

It is an arithmetic number, because the mean of its divisors is an integer number (191994).

2³⁸³⁹⁸⁷ is an apocalyptic number.

383987 is a deficient number, since it is larger than the sum of its proper divisors (1).

383987 is an equidigital number, since it uses as much as digits as its factorization.

383987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 38.

The square root of 383987 is about 619.6668459745. Note that the first 3 decimals coincide. The cubic root of 383987 is about 72.6840034760.

The spelling of 383987 in words is "three hundred eighty-three thousand, nine hundred eighty-seven".