10999999 has 4 divisors (see below), whose sum is σ = 11022120. Its totient is φ = 10977880.

The previous prime is 10999997. The next prime is 11000027. The reversal of 10999999 is 99999901.

It is a happy number.

10999999 is digitally balanced in base 3, 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: 99999901 = 151 ⋅662251.

It is a cyclic number.

It is not a de Polignac number, because 10999999 - 2¹ = 10999997 is a prime.

It is a Duffinian number.

10999999 is a modest number, since divided by 9999 gives 1099 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10999997) 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, 10297 + ... + 11314.

It is an arithmetic number, because the mean of its divisors is an integer number (2755530).

Almost surely, 2^10999999 is an apocalyptic number.

10999999 is a deficient number, since it is larger than the sum of its proper divisors (22121).

10999999 is an equidigital number, since it uses as much as digits as its factorization.

10999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22120.

The product of its (nonzero) digits is 531441, while the sum is 55.

The square root of 10999999 is about 3316.6246395997. The cubic root of 10999999 is about 222.3980023176.

It can be divided in two parts, 1099 and 9999, that multiplied together give a palindrome (10988901).

The spelling of 10999999 in words is "ten million, nine hundred ninety-nine thousand, nine hundred ninety-nine".