1090908889 has 4 divisors (see below), whose sum is σ = 1246753024. Its totient is φ = 935064756.

The previous prime is 1090908881. The next prime is 1090908953. The reversal of 1090908889 is 9888090901.

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 1090908889 - 2³ = 1090908881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1090908881) 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, 77922057 + ... + 77922070.

It is an arithmetic number, because the mean of its divisors is an integer number (311688256).

Almost surely, 2^1090908889 is an apocalyptic number.

It is an amenable number.

1090908889 is a deficient number, since it is larger than the sum of its proper divisors (155844135).

1090908889 is an equidigital number, since it uses as much as digits as its factorization.

1090908889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155844134.

The product of its (nonzero) digits is 373248, while the sum is 52.

The square root of 1090908889 is about 33028.9098972400. The cubic root of 1090908889 is about 1029.4284348902.

The spelling of 1090908889 in words is "one billion, ninety million, nine hundred eight thousand, eight hundred eighty-nine".