1087775917 has 2 divisors, whose sum is σ = 1087775918. Its totient is φ = 1087775916.

The previous prime is 1087775911. The next prime is 1087775977. The reversal of 1087775917 is 7195777801.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 635745796 + 452030121 = 25214^2 + 21261^2 .

It is a cyclic number.

It is not a de Polignac number, because 1087775917 - 2¹⁵ = 1087743149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1087775911) 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, 543887958 + 543887959.

It is an arithmetic number, because the mean of its divisors is an integer number (543887959).

Almost surely, 2^1087775917 is an apocalyptic number.

It is an amenable number.

1087775917 is a deficient number, since it is larger than the sum of its proper divisors (1).

1087775917 is an equidigital number, since it uses as much as digits as its factorization.

1087775917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864360, while the sum is 52.

The square root of 1087775917 is about 32981.4480731213. The cubic root of 1087775917 is about 1028.4420210606.

The spelling of 1087775917 in words is "one billion, eighty-seven million, seven hundred seventy-five thousand, nine hundred seventeen".