545876981 has 8 divisors (see below), whose sum is σ = 589616664. Its totient is φ = 502387200.

The previous prime is 545876977. The next prime is 545876999. The reversal of 545876981 is 189678545.

545876981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 654481 + 545222500 = 809^2 + 23350^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 545876981 - 2² = 545876977 is a prime.

It is a super-2 number, since 2×545876981² = 595963356771348722, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545876951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57920 + ... + 66681.

It is an arithmetic number, because the mean of its divisors is an integer number (73702083).

Almost surely, 2^545876981 is an apocalyptic number.

It is an amenable number.

545876981 is a deficient number, since it is larger than the sum of its proper divisors (43739683).

545876981 is a wasteful number, since it uses less digits than its factorization.

545876981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124951.

The product of its digits is 2419200, while the sum is 53.

The square root of 545876981 is about 23364.0103792136. The cubic root of 545876981 is about 817.2688138527.

The spelling of 545876981 in words is "five hundred forty-five million, eight hundred seventy-six thousand, nine hundred eighty-one".