881864257 has 2 divisors, whose sum is σ = 881864258. Its totient is φ = 881864256.

The previous prime is 881864231. The next prime is 881864323. The reversal of 881864257 is 752468188.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 710542336 + 171321921 = 26656^2 + 13089^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-881864257 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 881864257.

It is not a weakly prime, because it can be changed into another prime (881864227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 440932128 + 440932129.

It is an arithmetic number, because the mean of its divisors is an integer number (440932129).

Almost surely, 2^881864257 is an apocalyptic number.

It is an amenable number.

881864257 is a deficient number, since it is larger than the sum of its proper divisors (1).

881864257 is an equidigital number, since it uses as much as digits as its factorization.

881864257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 860160, while the sum is 49.

The square root of 881864257 is about 29696.1993696163. The cubic root of 881864257 is about 958.9601939663.

The spelling of 881864257 in words is "eight hundred eighty-one million, eight hundred sixty-four thousand, two hundred fifty-seven".