1089262689 has 4 divisors (see below), whose sum is σ = 1452350256. Its totient is φ = 726175124.

The previous prime is 1089262663. The next prime is 1089262729. The reversal of 1089262689 is 9862629801.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1089262689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1089264689) 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 in 3 ways as a sum of consecutive naturals, for example, 181543779 + ... + 181543784.

It is an arithmetic number, because the mean of its divisors is an integer number (363087564).

Almost surely, 2^1089262689 is an apocalyptic number.

It is an amenable number.

1089262689 is a deficient number, since it is larger than the sum of its proper divisors (363087567).

1089262689 is an equidigital number, since it uses as much as digits as its factorization.

1089262689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363087566.

The product of its (nonzero) digits is 746496, while the sum is 51.

The square root of 1089262689 is about 33003.9798963701. The cubic root of 1089262689 is about 1028.9103658934.

The spelling of 1089262689 in words is "one billion, eighty-nine million, two hundred sixty-two thousand, six hundred eighty-nine".