541989 has 18 divisors (see below), whose sum is σ = 911430. Its totient is φ = 309456.

The previous prime is 541987. The next prime is 541991. The reversal of 541989 is 989145.

It is an interprime number because it is at equal distance from previous prime (541987) and next prime (541991).

It can be written as a sum of positive squares in only one way, i.e., 540225 + 1764 = 735^2 + 42^2 .

It is not a de Polignac number, because 541989 - 2¹ = 541987 is a prime.

It is a super-2 number, since 2×541989² = 587504152242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (541987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 174 + ... + 1055.

It is an arithmetic number, because the mean of its divisors is an integer number (50635).

2⁵⁴¹⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

541989 is a deficient number, since it is larger than the sum of its proper divisors (369441).

541989 is a wasteful number, since it uses less digits than its factorization.

541989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249 (or 1239 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 541989 is about 736.1990220042. The cubic root of 541989 is about 81.5323870428.

The spelling of 541989 in words is "five hundred forty-one thousand, nine hundred eighty-nine".