204100987 has 2 divisors, whose sum is σ = 204100988. Its totient is φ = 204100986.

The previous prime is 204100957. The next prime is 204101033. The reversal of 204100987 is 789001402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 204100987 - 2⁷ = 204100859 is a prime.

It is not a weakly prime, because it can be changed into another prime (204100957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102050493 + 102050494.

It is an arithmetic number, because the mean of its divisors is an integer number (102050494).

Almost surely, 2^204100987 is an apocalyptic number.

204100987 is a deficient number, since it is larger than the sum of its proper divisors (1).

204100987 is an equidigital number, since it uses as much as digits as its factorization.

204100987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 204100987 is about 14286.3916717973. The cubic root of 204100987 is about 588.7736540248.

The spelling of 204100987 in words is "two hundred four million, one hundred thousand, nine hundred eighty-seven".