541705981 has 4 divisors (see below), whose sum is σ = 554918364. Its totient is φ = 528493600.

The previous prime is 541705961. The next prime is 541706021. The reversal of 541705981 is 189507145.

It is a happy number.

541705981 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 an emirpimes, since its reverse is a distinct semiprime: 189507145 = 5 ⋅37901429.

It can be written as a sum of positive squares in 2 ways, for example, as 56385081 + 485320900 = 7509^2 + 22030^2 .

It is a cyclic number.

It is not a de Polignac number, because 541705981 - 2¹⁷ = 541574909 is a prime.

It is a super-4 number, since 4×541705981⁴ (a number of 36 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3, 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (541705961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6606130 + ... + 6606211.

It is an arithmetic number, because the mean of its divisors is an integer number (138729591).

Almost surely, 2^541705981 is an apocalyptic number.

It is an amenable number.

541705981 is a deficient number, since it is larger than the sum of its proper divisors (13212383).

541705981 is a wasteful number, since it uses less digits than its factorization.

541705981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13212382.

The product of its (nonzero) digits is 50400, while the sum is 40.

The square root of 541705981 is about 23274.5779983225. The cubic root of 541705981 is about 815.1819288490.

The spelling of 541705981 in words is "five hundred forty-one million, seven hundred five thousand, nine hundred eighty-one".