1089864287 has 4 divisors (see below), whose sum is σ = 1090945440. Its totient is φ = 1088783136.

The previous prime is 1089864253. The next prime is 1089864319. The reversal of 1089864287 is 7824689801.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1089864287 - 2¹⁴ = 1089847903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1089864227) 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, 539063 + ... + 541080.

It is an arithmetic number, because the mean of its divisors is an integer number (272736360).

Almost surely, 2^1089864287 is an apocalyptic number.

1089864287 is a deficient number, since it is larger than the sum of its proper divisors (1081153).

1089864287 is a wasteful number, since it uses less digits than its factorization.

1089864287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081152.

The product of its (nonzero) digits is 1548288, while the sum is 53.

The square root of 1089864287 is about 33013.0926603370. The cubic root of 1089864287 is about 1029.0997528686.

The spelling of 1089864287 in words is "one billion, eighty-nine million, eight hundred sixty-four thousand, two hundred eighty-seven".