1587443161 has 2 divisors, whose sum is σ = 1587443162. Its totient is φ = 1587443160.

The previous prime is 1587443129. The next prime is 1587443177. The reversal of 1587443161 is 1613447851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1483790400 + 103652761 = 38520^2 + 10181^2 .

It is a cyclic number.

It is not a de Polignac number, because 1587443161 - 2⁵ = 1587443129 is a prime.

It is not a weakly prime, because it can be changed into another prime (1587443861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 793721580 + 793721581.

It is an arithmetic number, because the mean of its divisors is an integer number (793721581).

Almost surely, 2^1587443161 is an apocalyptic number.

It is an amenable number.

1587443161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1587443161 is an equidigital number, since it uses as much as digits as its factorization.

1587443161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 40.

The square root of 1587443161 is about 39842.7303406782. The cubic root of 1587443161 is about 1166.5393543343.

The spelling of 1587443161 in words is "one billion, five hundred eighty-seven million, four hundred forty-three thousand, one hundred sixty-one".