5211989 has 4 divisors (see below), whose sum is σ = 5216556. Its totient is φ = 5207424.

The previous prime is 5211959. The next prime is 5212003. The reversal of 5211989 is 9891125.

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 2 ways, for example, as 3204100 + 2007889 = 1790^2 + 1417^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5211989 is a prime.

It is a super-2 number, since 2×5211989² = 54329658672242, 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 (5211919) 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 3 ways as a sum of consecutive naturals, for example, 1127 + ... + 3419.

It is an arithmetic number, because the mean of its divisors is an integer number (1304139).

Almost surely, 2^5211989 is an apocalyptic number.

It is an amenable number.

5211989 is a deficient number, since it is larger than the sum of its proper divisors (4567).

5211989 is a wasteful number, since it uses less digits than its factorization.

5211989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4566.

The product of its digits is 6480, while the sum is 35.

The square root of 5211989 is about 2282.9780988875. The cubic root of 5211989 is about 173.3808642661.

The spelling of 5211989 in words is "five million, two hundred eleven thousand, nine hundred eighty-nine".