210911089 has 8 divisors (see below), whose sum is σ = 215371080. Its totient is φ = 206493696.

The previous prime is 210911053. The next prime is 210911101. The reversal of 210911089 is 980119012.

It can be written as a sum of positive squares in 4 ways, for example, as 110250000 + 100661089 = 10500^2 + 10033^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210911089 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 210911089.

It is not an unprimeable number, because it can be changed into a prime (210911189) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 544 + ... + 20545.

It is an arithmetic number, because the mean of its divisors is an integer number (26921385).

Almost surely, 2^210911089 is an apocalyptic number.

It is an amenable number.

210911089 is a deficient number, since it is larger than the sum of its proper divisors (4459991).

210911089 is a wasteful number, since it uses less digits than its factorization.

210911089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21299.

The product of its (nonzero) digits is 1296, while the sum is 31.

The square root of 210911089 is about 14522.7782810315. The cubic root of 210911089 is about 595.2505490960.

The spelling of 210911089 in words is "two hundred ten million, nine hundred eleven thousand, eighty-nine".