210768489 has 6 divisors (see below), whose sum is σ = 304443386. Its totient is φ = 140512320.

The previous prime is 210768479. The next prime is 210768497. The reversal of 210768489 is 984867012.

210768489 is a `hidden beast` number, since 2 + 107 + 68 + 489 = 666.

It can be written as a sum of positive squares in only one way, i.e., 136118889 + 74649600 = 11667^2 + 8640^2 .

It is not a de Polignac number, because 210768489 - 2¹⁶ = 210702953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210768419) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11709352 + ... + 11709369.

Almost surely, 2^210768489 is an apocalyptic number.

It is an amenable number.

210768489 is a deficient number, since it is larger than the sum of its proper divisors (93674897).

210768489 is a wasteful number, since it uses less digits than its factorization.

210768489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23418727 (or 23418724 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 210768489 is about 14517.8679219781. The cubic root of 210768489 is about 595.1163663842.

The spelling of 210768489 in words is "two hundred ten million, seven hundred sixty-eight thousand, four hundred eighty-nine".