8487791057 has 2 divisors, whose sum is σ = 8487791058. Its totient is φ = 8487791056.

The previous prime is 8487791029. The next prime is 8487791077. The reversal of 8487791057 is 7501977848.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8487752641 + 38416 = 92129^2 + 196^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8487791057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8487790993 and 8487791011.

It is not a weakly prime, because it can be changed into another prime (8487791077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4243895528 + 4243895529.

It is an arithmetic number, because the mean of its divisors is an integer number (4243895529).

Almost surely, 2^8487791057 is an apocalyptic number.

It is an amenable number.

8487791057 is a deficient number, since it is larger than the sum of its proper divisors (1).

8487791057 is an equidigital number, since it uses as much as digits as its factorization.

8487791057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3951360, while the sum is 56.

The square root of 8487791057 is about 92129.2084900332. The cubic root of 8487791057 is about 2039.8499711049.

The spelling of 8487791057 in words is "eight billion, four hundred eighty-seven million, seven hundred ninety-one thousand, fifty-seven".