211049989 has 2 divisors, whose sum is σ = 211049990. Its totient is φ = 211049988.

The previous prime is 211049983. The next prime is 211050017. The reversal of 211049989 is 989940112.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 174689089 + 36360900 = 13217^2 + 6030^2 .

It is a cyclic number.

It is not a de Polignac number, because 211049989 - 2⁹ = 211049477 is a prime.

It is a super-3 number, since 3×211049989³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211049983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105524994 + 105524995.

It is an arithmetic number, because the mean of its divisors is an integer number (105524995).

Almost surely, 2^211049989 is an apocalyptic number.

It is an amenable number.

211049989 is a deficient number, since it is larger than the sum of its proper divisors (1).

211049989 is an equidigital number, since it uses as much as digits as its factorization.

211049989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 43.

The square root of 211049989 is about 14527.5596367731. The cubic root of 211049989 is about 595.3811920730.

The spelling of 211049989 in words is "two hundred eleven million, forty-nine thousand, nine hundred eighty-nine".