10899989 has 2 divisors, whose sum is σ = 10899990. Its totient is φ = 10899988.

The previous prime is 10899979. The next prime is 10900007. The reversal of 10899989 is 98999801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8151025 + 2748964 = 2855^2 + 1658^2 .

It is a cyclic number.

It is not a de Polignac number, because 10899989 - 2¹² = 10895893 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

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 10899989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10899929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5449994 + 5449995.

It is an arithmetic number, because the mean of its divisors is an integer number (5449995).

Almost surely, 2^10899989 is an apocalyptic number.

It is an amenable number.

10899989 is a deficient number, since it is larger than the sum of its proper divisors (1).

10899989 is an equidigital number, since it uses as much as digits as its factorization.

10899989 is an evil number, because the sum of its binary digits is even.

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

The square root of 10899989 is about 3301.5131379415. The cubic root of 10899989 is about 221.7219485112.

The spelling of 10899989 in words is "ten million, eight hundred ninety-nine thousand, nine hundred eighty-nine".