4047862981 has 2 divisors, whose sum is σ = 4047862982. Its totient is φ = 4047862980.

The previous prime is 4047862963. The next prime is 4047862991. The reversal of 4047862981 is 1892687404.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3644053956 + 403809025 = 60366^2 + 20095^2 .

It is a cyclic number.

It is not a de Polignac number, because 4047862981 - 2¹¹ = 4047860933 is a prime.

It is a super-2 number, since 2×4047862981² = 32770389425900412722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4047862901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2023931490 + 2023931491.

It is an arithmetic number, because the mean of its divisors is an integer number (2023931491).

Almost surely, 2^4047862981 is an apocalyptic number.

It is an amenable number.

4047862981 is a deficient number, since it is larger than the sum of its proper divisors (1).

4047862981 is an equidigital number, since it uses as much as digits as its factorization.

4047862981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 774144, while the sum is 49.

The square root of 4047862981 is about 63622.8180843948. The cubic root of 4047862981 is about 1593.7074437623.

The spelling of 4047862981 in words is "four billion, forty-seven million, eight hundred sixty-two thousand, nine hundred eighty-one".