8477291881 has 2 divisors, whose sum is σ = 8477291882. Its totient is φ = 8477291880.

The previous prime is 8477291843. The next prime is 8477291923. The reversal of 8477291881 is 1881927748.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8338429225 + 138862656 = 91315^2 + 11784^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8477291881 is a prime.

It is a super-2 number, since 2×8477291881² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8477291981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4238645940 + 4238645941.

It is an arithmetic number, because the mean of its divisors is an integer number (4238645941).

Almost surely, 2^8477291881 is an apocalyptic number.

It is an amenable number.

8477291881 is a deficient number, since it is larger than the sum of its proper divisors (1).

8477291881 is an equidigital number, since it uses as much as digits as its factorization.

8477291881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1806336, while the sum is 55.

The square root of 8477291881 is about 92072.2101450812. The cubic root of 8477291881 is about 2039.0085436773.

The spelling of 8477291881 in words is "eight billion, four hundred seventy-seven million, two hundred ninety-one thousand, eight hundred eighty-one".