212197489 has 9 divisors (see below), whose sum is σ = 246960651. Its totient is φ = 181796160.

The previous prime is 212197463. The next prime is 212197543. The reversal of 212197489 is 984791212.

It is a happy number.

The square root of 212197489 is 14567.

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

It can be written as a sum of positive squares in only one way, i.e., 80407089 + 131790400 = 8967^2 + 11480^2 .

It is not a de Polignac number, because 212197489 - 2⁵ = 212197457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212197409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 100929 + ... + 103009.

Almost surely, 2^212197489 is an apocalyptic number.

212197489 is the 14567-th square number.

212197489 is the 7284-th centered octagonal number.

It is an amenable number.

212197489 is a deficient number, since it is larger than the sum of its proper divisors (34763162).

212197489 is an frugal number, since it uses more digits than its factorization.

212197489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4176 (or 2088 counting only the distinct ones).

The product of its digits is 72576, while the sum is 43.

The cubic root of 212197489 is about 596.4582914510.

The spelling of 212197489 in words is "two hundred twelve million, one hundred ninety-seven thousand, four hundred eighty-nine".