10999889 has 4 divisors (see below), whose sum is σ = 11055924. Its totient is φ = 10943856.

The previous prime is 10999871. The next prime is 10999949. The reversal of 10999889 is 98899901.

10999889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98899901 = 9601 ⋅10301.

It can be written as a sum of positive squares in 2 ways, for example, as 9579025 + 1420864 = 3095^2 + 1192^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10999889 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 10999889.

It is not an unprimeable number, because it can be changed into a prime (10999829) 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, 27722 + ... + 28115.

It is an arithmetic number, because the mean of its divisors is an integer number (2763981).

Almost surely, 2^10999889 is an apocalyptic number.

It is an amenable number.

10999889 is a deficient number, since it is larger than the sum of its proper divisors (56035).

10999889 is an equidigital number, since it uses as much as digits as its factorization.

10999889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56034.

The product of its (nonzero) digits is 419904, while the sum is 53.

The square root of 10999889 is about 3316.6080564336. The cubic root of 10999889 is about 222.3972609884.

The spelling of 10999889 in words is "ten million, nine hundred ninety-nine thousand, eight hundred eighty-nine".