8531960891 has 2 divisors, whose sum is σ = 8531960892. Its totient is φ = 8531960890.

The previous prime is 8531960861. The next prime is 8531960903. The reversal of 8531960891 is 1980691358.

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-8531960891 is a prime.

It is not a weakly prime, because it can be changed into another prime (8531960821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4265980445 + 4265980446.

It is an arithmetic number, because the mean of its divisors is an integer number (4265980446).

Almost surely, 2^8531960891 is an apocalyptic number.

8531960891 is a deficient number, since it is larger than the sum of its proper divisors (1).

8531960891 is an equidigital number, since it uses as much as digits as its factorization.

8531960891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 466560, while the sum is 50.

The square root of 8531960891 is about 92368.6142095896. The cubic root of 8531960891 is about 2043.3822601438.

The spelling of 8531960891 in words is "eight billion, five hundred thirty-one million, nine hundred sixty thousand, eight hundred ninety-one".