8261459887 has 2 divisors, whose sum is σ = 8261459888. Its totient is φ = 8261459886.

The previous prime is 8261459831. The next prime is 8261459903. The reversal of 8261459887 is 7889541628.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8261459887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8261459807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4130729943 + 4130729944.

It is an arithmetic number, because the mean of its divisors is an integer number (4130729944).

Almost surely, 2^8261459887 is an apocalyptic number.

8261459887 is a deficient number, since it is larger than the sum of its proper divisors (1).

8261459887 is an equidigital number, since it uses as much as digits as its factorization.

8261459887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7741440, while the sum is 58.

The square root of 8261459887 is about 90892.5733324786. The cubic root of 8261459887 is about 2021.5551765089. Note that the first 3 decimals are identical.

The spelling of 8261459887 in words is "eight billion, two hundred sixty-one million, four hundred fifty-nine thousand, eight hundred eighty-seven".