10889999 has 4 divisors (see below), whose sum is σ = 10896600. Its totient is φ = 10883400.

The previous prime is 10889987. The next prime is 10890023. The reversal of 10889999 is 99998801.

10889999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 3300²-1.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 99998801 = 7 ⋅14285543.

It is a cyclic number.

It is not a de Polignac number, because 10889999 - 2⁸ = 10889743 is a prime.

It is a Duffinian number.

10889999 is a modest number, since divided by 9999 gives 1088 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 10889999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10889929) 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, 1649 + ... + 4949.

It is an arithmetic number, because the mean of its divisors is an integer number (2724150).

Almost surely, 2^10889999 is an apocalyptic number.

10889999 is a deficient number, since it is larger than the sum of its proper divisors (6601).

10889999 is an equidigital number, since it uses as much as digits as its factorization.

10889999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6600.

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

The square root of 10889999 is about 3299.9998484848. Note that the first 3 decimals coincide. The cubic root of 10889999 is about 221.6541906660.

The spelling of 10889999 in words is "ten million, eight hundred eighty-nine thousand, nine hundred ninety-nine".