1087659889 has 4 divisors (see below), whose sum is σ = 1090019700. Its totient is φ = 1085300080.

The previous prime is 1087659887. The next prime is 1087659899. The reversal of 1087659889 is 9889567801.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 180445489 + 907214400 = 13433^2 + 30120^2 .

It is a cyclic number.

It is not a de Polignac number, because 1087659889 - 2¹ = 1087659887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1087659887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1179214 + ... + 1180135.

It is an arithmetic number, because the mean of its divisors is an integer number (272504925).

Almost surely, 2^1087659889 is an apocalyptic number.

It is an amenable number.

1087659889 is a deficient number, since it is larger than the sum of its proper divisors (2359811).

1087659889 is an equidigital number, since it uses as much as digits as its factorization.

1087659889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2359810.

The product of its (nonzero) digits is 8709120, while the sum is 61.

The square root of 1087659889 is about 32979.6890373454. The cubic root of 1087659889 is about 1028.4054533841.

The spelling of 1087659889 in words is "one billion, eighty-seven million, six hundred fifty-nine thousand, eight hundred eighty-nine".