4877981 has 2 divisors, whose sum is σ = 4877982. Its totient is φ = 4877980.

The previous prime is 4877959. The next prime is 4878007. The reversal of 4877981 is 1897784.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3648100 + 1229881 = 1910^2 + 1109^2 .

It is a cyclic number.

It is not a de Polignac number, because 4877981 - 2¹⁰ = 4876957 is a prime.

It is a super-2 number, since 2×4877981² = 47589397272722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4877911) 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 as a sum of consecutive naturals, namely, 2438990 + 2438991.

It is an arithmetic number, because the mean of its divisors is an integer number (2438991).

Almost surely, 2^4877981 is an apocalyptic number.

It is an amenable number.

4877981 is a deficient number, since it is larger than the sum of its proper divisors (1).

4877981 is an equidigital number, since it uses as much as digits as its factorization.

4877981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896, while the sum is 44.

The square root of 4877981 is about 2208.6151769831. The cubic root of 4877981 is about 169.5951264805.

The spelling of 4877981 in words is "four million, eight hundred seventy-seven thousand, nine hundred eighty-one".