1089777889 has 4 divisors (see below), whose sum is σ = 1147134640. Its totient is φ = 1032421140.

The previous prime is 1089777883. The next prime is 1089777893. The reversal of 1089777889 is 9887779801.

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 not a de Polignac number, because 1089777889 - 2¹⁵ = 1089745121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1089777889.

It is not an unprimeable number, because it can be changed into a prime (1089777883) 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, 28678347 + ... + 28678384.

It is an arithmetic number, because the mean of its divisors is an integer number (286783660).

Almost surely, 2^1089777889 is an apocalyptic number.

1089777889 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1089777889 is a deficient number, since it is larger than the sum of its proper divisors (57356751).

1089777889 is an equidigital number, since it uses as much as digits as its factorization.

1089777889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57356750.

The product of its (nonzero) digits is 14224896, while the sum is 64.

The square root of 1089777889 is about 33011.7840929569. The cubic root of 1089777889 is about 1029.0725585010.

The spelling of 1089777889 in words is "one billion, eighty-nine million, seven hundred seventy-seven thousand, eight hundred eighty-nine".