1087000091 has 2 divisors, whose sum is σ = 1087000092. Its totient is φ = 1087000090.

The previous prime is 1087000087. The next prime is 1087000093. The reversal of 1087000091 is 1900007801.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1087000091 - 2² = 1087000087 is a prime.

It is a Sophie Germain prime.

Together with 1087000093, it forms a pair of twin primes.

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 1087000091.

It is not a weakly prime, because it can be changed into another prime (1087000093) 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, 543500045 + 543500046.

It is an arithmetic number, because the mean of its divisors is an integer number (543500046).

Almost surely, 2^1087000091 is an apocalyptic number.

1087000091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1087000091 is an equidigital number, since it uses as much as digits as its factorization.

1087000091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 26.

The square root of 1087000091 is about 32969.6844237248. The cubic root of 1087000091 is about 1028.1974603279.

Adding to 1087000091 its reverse (1900007801), we get a palindrome (2987007892).

The spelling of 1087000091 in words is "one billion, eighty-seven million, ninety-one", and thus it is an aban number and an uban number.