4978081 has 2 divisors, whose sum is σ = 4978082. Its totient is φ = 4978080.

The previous prime is 4978079. The next prime is 4978109. The reversal of 4978081 is 1808794.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4665600 + 312481 = 2160^2 + 559^2 .

It is a cyclic number.

It is not a de Polignac number, because 4978081 - 2¹ = 4978079 is a prime.

It is a super-2 number, since 2×4978081² = 49562580885122, which contains 22 as substring.

Together with 4978079, it forms a pair of twin primes.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 4978081.

It is not a weakly prime, because it can be changed into another prime (4978031) 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, 2489040 + 2489041.

It is an arithmetic number, because the mean of its divisors is an integer number (2489041).

Almost surely, 2^4978081 is an apocalyptic number.

It is an amenable number.

4978081 is a deficient number, since it is larger than the sum of its proper divisors (1).

4978081 is an equidigital number, since it uses as much as digits as its factorization.

4978081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 4978081 is about 2231.1613567826. The cubic root of 4978081 is about 170.7473555594.

The spelling of 4978081 in words is "four million, nine hundred seventy-eight thousand, eighty-one".