866130487 has 2 divisors, whose sum is σ = 866130488. Its totient is φ = 866130486.

The previous prime is 866130451. The next prime is 866130497. The reversal of 866130487 is 784031668.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-866130487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866130427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433065243 + 433065244.

It is an arithmetic number, because the mean of its divisors is an integer number (433065244).

Almost surely, 2^866130487 is an apocalyptic number.

866130487 is a deficient number, since it is larger than the sum of its proper divisors (1).

866130487 is an equidigital number, since it uses as much as digits as its factorization.

866130487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 866130487 is about 29430.0949199964. The cubic root of 866130487 is about 953.2228444525. Note that the first 3 decimals are identical.

The spelling of 866130487 in words is "eight hundred sixty-six million, one hundred thirty thousand, four hundred eighty-seven".