1002020087 has 2 divisors, whose sum is σ = 1002020088. Its totient is φ = 1002020086.

The previous prime is 1002020057. The next prime is 1002020177. The reversal of 1002020087 is 7800202001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1002020087 - 2¹² = 1002015991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1002020017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501010043 + 501010044.

It is an arithmetic number, because the mean of its divisors is an integer number (501010044).

Almost surely, 2^1002020087 is an apocalyptic number.

1002020087 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002020087 is an equidigital number, since it uses as much as digits as its factorization.

1002020087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 1002020087 is about 31654.7008673277. The cubic root of 1002020087 is about 1000.6729094247.

Adding to 1002020087 its reverse (7800202001), we get a palindrome (8802222088).

The spelling of 1002020087 in words is "one billion, two million, twenty thousand, eighty-seven".