881806817 has 2 divisors, whose sum is σ = 881806818. Its totient is φ = 881806816.

The previous prime is 881806787. The next prime is 881806819. The reversal of 881806817 is 718608188.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 861950881 + 19855936 = 29359^2 + 4456^2 .

It is a cyclic number.

It is not a de Polignac number, because 881806817 - 2⁶ = 881806753 is a prime.

Together with 881806819, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (881806819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 440903408 + 440903409.

It is an arithmetic number, because the mean of its divisors is an integer number (440903409).

Almost surely, 2^881806817 is an apocalyptic number.

It is an amenable number.

881806817 is a deficient number, since it is larger than the sum of its proper divisors (1).

881806817 is an equidigital number, since it uses as much as digits as its factorization.

881806817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172032, while the sum is 47.

The square root of 881806817 is about 29695.2322267397. The cubic root of 881806817 is about 958.9393729730.

The spelling of 881806817 in words is "eight hundred eighty-one million, eight hundred six thousand, eight hundred seventeen".