201020987 has 2 divisors, whose sum is σ = 201020988. Its totient is φ = 201020986.

The previous prime is 201020977. The next prime is 201021043. The reversal of 201020987 is 789020102.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201020987 - 2⁶ = 201020923 is a prime.

It is not a weakly prime, because it can be changed into another prime (201020977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100510493 + 100510494.

It is an arithmetic number, because the mean of its divisors is an integer number (100510494).

Almost surely, 2^201020987 is an apocalyptic number.

201020987 is a deficient number, since it is larger than the sum of its proper divisors (1).

201020987 is an equidigital number, since it uses as much as digits as its factorization.

201020987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 201020987 is about 14178.1870138604. The cubic root of 201020987 is about 585.7969871070.

The spelling of 201020987 in words is "two hundred one million, twenty thousand, nine hundred eighty-seven".