4687747861 has 2 divisors, whose sum is σ = 4687747862. Its totient is φ = 4687747860.

The previous prime is 4687747843. The next prime is 4687747901. The reversal of 4687747861 is 1687477864.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2772022500 + 1915725361 = 52650^2 + 43769^2 .

It is a cyclic number.

It is not a de Polignac number, because 4687747861 - 2⁹ = 4687747349 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4687747796 and 4687747805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4687747261) 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, 2343873930 + 2343873931.

It is an arithmetic number, because the mean of its divisors is an integer number (2343873931).

Almost surely, 2^4687747861 is an apocalyptic number.

It is an amenable number.

4687747861 is a deficient number, since it is larger than the sum of its proper divisors (1).

4687747861 is an equidigital number, since it uses as much as digits as its factorization.

4687747861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12644352, while the sum is 58.

The square root of 4687747861 is about 68467.1297850290. The cubic root of 4687747861 is about 1673.6118726980.

The spelling of 4687747861 in words is "four billion, six hundred eighty-seven million, seven hundred forty-seven thousand, eight hundred sixty-one".