4999681 has 2 divisors, whose sum is σ = 4999682. Its totient is φ = 4999680.

The previous prime is 4999667. The next prime is 4999693. The reversal of 4999681 is 1869994.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3459600 + 1540081 = 1860^2 + 1241^2 .

It is a cyclic number.

It is not a de Polignac number, because 4999681 - 2¹⁷ = 4868609 is a prime.

It is a super-2 number, since 2×4999681² = 49993620203522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4999651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2499840 + 2499841.

It is an arithmetic number, because the mean of its divisors is an integer number (2499841).

Almost surely, 2^4999681 is an apocalyptic number.

It is an amenable number.

4999681 is a deficient number, since it is larger than the sum of its proper divisors (1).

4999681 is an equidigital number, since it uses as much as digits as its factorization.

4999681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 46.

The square root of 4999681 is about 2235.9966457935. The cubic root of 4999681 is about 170.9939580415.

The spelling of 4999681 in words is "four million, nine hundred ninety-nine thousand, six hundred eighty-one".