204107987 has 2 divisors, whose sum is σ = 204107988. Its totient is φ = 204107986.

The previous prime is 204107983. The next prime is 204108019. The reversal of 204107987 is 789701402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 204107987 - 2² = 204107983 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 204107987.

It is not a weakly prime, because it can be changed into another prime (204107983) 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 as a sum of consecutive naturals, namely, 102053993 + 102053994.

It is an arithmetic number, because the mean of its divisors is an integer number (102053994).

Almost surely, 2^204107987 is an apocalyptic number.

204107987 is a deficient number, since it is larger than the sum of its proper divisors (1).

204107987 is an equidigital number, since it uses as much as digits as its factorization.

204107987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 204107987 is about 14286.6366580802. The cubic root of 204107987 is about 588.7803849549.

The spelling of 204107987 in words is "two hundred four million, one hundred seven thousand, nine hundred eighty-seven".