8531960861 has 2 divisors, whose sum is σ = 8531960862. Its totient is φ = 8531960860.

The previous prime is 8531960831. The next prime is 8531960891. The reversal of 8531960861 is 1680691358.

It is a balanced prime because it is at equal distance from previous prime (8531960831) and next prime (8531960891).

It can be written as a sum of positive squares in only one way, i.e., 4599416761 + 3932544100 = 67819^2 + 62710^2 .

It is a cyclic number.

It is not a de Polignac number, because 8531960861 - 2⁶ = 8531960797 is a prime.

It is a super-2 number, since 2×8531960861² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4265980430 + 4265980431.

It is an arithmetic number, because the mean of its divisors is an integer number (4265980431).

Almost surely, 2^8531960861 is an apocalyptic number.

8531960861 is the 41309-th centered decagonal number.

It is an amenable number.

8531960861 is a deficient number, since it is larger than the sum of its proper divisors (1).

8531960861 is an equidigital number, since it uses as much as digits as its factorization.

8531960861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 47.

The square root of 8531960861 is about 92368.6140471968. The cubic root of 8531960861 is about 2043.3822577489.

The spelling of 8531960861 in words is "eight billion, five hundred thirty-one million, nine hundred sixty thousand, eight hundred sixty-one".