10995989 has 2 divisors, whose sum is σ = 10995990. Its totient is φ = 10995988.

The previous prime is 10995977. The next prime is 10996019. The reversal of 10995989 is 98959901.

10995989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6300100 + 4695889 = 2510^2 + 2167^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10995989 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10995289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5497994 + 5497995.

It is an arithmetic number, because the mean of its divisors is an integer number (5497995).

Almost surely, 2^10995989 is an apocalyptic number.

It is an amenable number.

10995989 is a deficient number, since it is larger than the sum of its proper divisors (1).

10995989 is an equidigital number, since it uses as much as digits as its factorization.

10995989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 262440, while the sum is 50.

The square root of 10995989 is about 3316.0200542216. The cubic root of 10995989 is about 222.3709743036.

The spelling of 10995989 in words is "ten million, nine hundred ninety-five thousand, nine hundred eighty-nine".