210873668 has 6 divisors (see below), whose sum is σ = 369028926. Its totient is φ = 105436832.

The previous prime is 210873667. The next prime is 210873709. The reversal of 210873668 is 866378012.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 165688384 + 45185284 = 12872^2 + 6722^2 .

It is not an unprimeable number, because it can be changed into a prime (210873667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26359205 + ... + 26359212.

It is an arithmetic number, because the mean of its divisors is an integer number (61504821).

Almost surely, 2^210873668 is an apocalyptic number.

It is an amenable number.

210873668 is a deficient number, since it is larger than the sum of its proper divisors (158155258).

210873668 is a wasteful number, since it uses less digits than its factorization.

210873668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52718421 (or 52718419 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 210873668 is about 14521.4898684674. The cubic root of 210873668 is about 595.2153428101.

The spelling of 210873668 in words is "two hundred ten million, eight hundred seventy-three thousand, six hundred sixty-eight".