1587316057 has 2 divisors, whose sum is σ = 1587316058. Its totient is φ = 1587316056.

The previous prime is 1587316009. The next prime is 1587316067. The reversal of 1587316057 is 7506137851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1517024601 + 70291456 = 38949^2 + 8384^2 .

It is an emirp because it is prime and its reverse (7506137851) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1587316057 is a prime.

It is not a weakly prime, because it can be changed into another prime (1587316067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 793658028 + 793658029.

It is an arithmetic number, because the mean of its divisors is an integer number (793658029).

Almost surely, 2^1587316057 is an apocalyptic number.

It is an amenable number.

1587316057 is a deficient number, since it is larger than the sum of its proper divisors (1).

1587316057 is an equidigital number, since it uses as much as digits as its factorization.

1587316057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 176400, while the sum is 43.

The square root of 1587316057 is about 39841.1352373398. The cubic root of 1587316057 is about 1166.5082191984.

The spelling of 1587316057 in words is "one billion, five hundred eighty-seven million, three hundred sixteen thousand, fifty-seven".