1087713809 has 36 divisors (see below), whose sum is σ = 1394040564. Its totient is φ = 841208256.

The previous prime is 1087713787. The next prime is 1087713811. The reversal of 1087713809 is 9083177801.

It can be written as a sum of positive squares in 2 ways, for example, as 110838784 + 976875025 = 10528^2 + 31255^2 .

It is not a de Polignac number, because 1087713809 - 2⁸ = 1087713553 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1087713809.

It is not an unprimeable number, because it can be changed into a prime (1087710809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1406747 + ... + 1407519.

It is an arithmetic number, because the mean of its divisors is an integer number (38723349).

Almost surely, 2^1087713809 is an apocalyptic number.

It is an amenable number.

1087713809 is a deficient number, since it is larger than the sum of its proper divisors (306326755).

1087713809 is an equidigital number, since it uses as much as digits as its factorization.

1087713809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894 (or 840 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 44.

The square root of 1087713809 is about 32980.5065000524. The cubic root of 1087713809 is about 1028.4224472704.

The spelling of 1087713809 in words is "one billion, eighty-seven million, seven hundred thirteen thousand, eight hundred nine".