204667987 has 2 divisors, whose sum is σ = 204667988. Its totient is φ = 204667986.

The previous prime is 204667951. The next prime is 204668011. The reversal of 204667987 is 789766402.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204667987 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 204667987.

It is not a weakly prime, because it can be changed into another prime (204667787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102333993 + 102333994.

It is an arithmetic number, because the mean of its divisors is an integer number (102333994).

Almost surely, 2^204667987 is an apocalyptic number.

204667987 is a deficient number, since it is larger than the sum of its proper divisors (1).

204667987 is an equidigital number, since it uses as much as digits as its factorization.

204667987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1016064, while the sum is 49.

The square root of 204667987 is about 14306.2219680809. The cubic root of 204667987 is about 589.3183615051.

The spelling of 204667987 in words is "two hundred four million, six hundred sixty-seven thousand, nine hundred eighty-seven".