212484869 has 4 divisors (see below), whose sum is σ = 212556960. Its totient is φ = 212412780.

The previous prime is 212484793. The next prime is 212484871. The reversal of 212484869 is 968484212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212484869 is a prime.

It is a super-2 number, since 2×212484869² = 90299639107894322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212484889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31427 + ... + 37584.

It is an arithmetic number, because the mean of its divisors is an integer number (53139240).

Almost surely, 2^212484869 is an apocalyptic number.

It is an amenable number.

212484869 is a deficient number, since it is larger than the sum of its proper divisors (72091).

212484869 is an equidigital number, since it uses as much as digits as its factorization.

212484869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72090.

The product of its digits is 221184, while the sum is 44.

The square root of 212484869 is about 14576.8607388559. The cubic root of 212484869 is about 596.7274320242.

The spelling of 212484869 in words is "two hundred twelve million, four hundred eighty-four thousand, eight hundred sixty-nine".