487081561 has 2 divisors, whose sum is σ = 487081562. Its totient is φ = 487081560.

The previous prime is 487081547. The next prime is 487081571. The reversal of 487081561 is 165180784.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 473715225 + 13366336 = 21765^2 + 3656^2 .

It is a cyclic number.

It is not a de Polignac number, because 487081561 - 2¹¹ = 487079513 is a prime.

It is not a weakly prime, because it can be changed into another prime (487081571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 243540780 + 243540781.

It is an arithmetic number, because the mean of its divisors is an integer number (243540781).

Almost surely, 2^487081561 is an apocalyptic number.

It is an amenable number.

487081561 is a deficient number, since it is larger than the sum of its proper divisors (1).

487081561 is an equidigital number, since it uses as much as digits as its factorization.

487081561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 487081561 is about 22069.9243541975. The cubic root of 487081561 is about 786.8052148924.

The spelling of 487081561 in words is "four hundred eighty-seven million, eighty-one thousand, five hundred sixty-one".