662187289 has 3 divisors (see below), whose sum is σ = 662213023. Its totient is φ = 662161556.

The previous prime is 662187287. The next prime is 662187299. The reversal of 662187289 is 982781266.

The square root of 662187289 is 25733.

It is a perfect power (a square), and thus also a powerful number.

662187289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 42575625 + 619611664 = 6525^2 + 24892^2 .

It is not a de Polignac number, because 662187289 - 2¹ = 662187287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (662187283) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 12867 + ... + 38599.

Almost surely, 2^662187289 is an apocalyptic number.

662187289 is the 25733-rd square number.

662187289 is the 12867-th centered octagonal number.

It is an amenable number.

662187289 is a deficient number, since it is larger than the sum of its proper divisors (25734).

662187289 is an frugal number, since it uses more digits than its factorization.

662187289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51466 (or 25733 counting only the distinct ones).

The product of its digits is 580608, while the sum is 49.

The cubic root of 662187289 is about 871.6195178337.

Multiplying 662187289 by its sum of digits (49), we get a square (32447177161 = 180131²).

The spelling of 662187289 in words is "six hundred sixty-two million, one hundred eighty-seven thousand, two hundred eighty-nine".