587131561 has 2 divisors, whose sum is σ = 587131562. Its totient is φ = 587131560.

The previous prime is 587131549. The next prime is 587131607. The reversal of 587131561 is 165131785.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 474368400 + 112763161 = 21780^2 + 10619^2 .

It is a cyclic number.

It is not a de Polignac number, because 587131561 - 2⁵ = 587131529 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 587131561.

It is not a weakly prime, because it can be changed into another prime (587131861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 293565780 + 293565781.

It is an arithmetic number, because the mean of its divisors is an integer number (293565781).

Almost surely, 2^587131561 is an apocalyptic number.

It is an amenable number.

587131561 is a deficient number, since it is larger than the sum of its proper divisors (1).

587131561 is an equidigital number, since it uses as much as digits as its factorization.

587131561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25200, while the sum is 37.

The square root of 587131561 is about 24230.7977788599. The cubic root of 587131561 is about 837.3592241588.

The spelling of 587131561 in words is "five hundred eighty-seven million, one hundred thirty-one thousand, five hundred sixty-one".