4787391786949 has 2 divisors, whose sum is σ = 4787391786950. Its totient is φ = 4787391786948.

The previous prime is 4787391786913. The next prime is 4787391786997. The reversal of 4787391786949 is 9496871937874.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3052033458049 + 1735358328900 = 1747007^2 + 1317330^2 .

It is a cyclic number.

It is not a de Polignac number, because 4787391786949 - 2²³ = 4787383398341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4787391796949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2393695893474 + 2393695893475.

It is an arithmetic number, because the mean of its divisors is an integer number (2393695893475).

Almost surely, 2^{4787391786949} is an apocalyptic number.

It is an amenable number.

4787391786949 is a deficient number, since it is larger than the sum of its proper divisors (1).

4787391786949 is an equidigital number, since it uses as much as digits as its factorization.

4787391786949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4608866304, while the sum is 82.

The spelling of 4787391786949 in words is "four trillion, seven hundred eighty-seven billion, three hundred ninety-one million, seven hundred eighty-six thousand, nine hundred forty-nine".