887821897 has 2 divisors, whose sum is σ = 887821898. Its totient is φ = 887821896.

The previous prime is 887821861. The next prime is 887821931. The reversal of 887821897 is 798128788.

It is a happy number.

887821897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 886907961 + 913936 = 29781^2 + 956^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-887821897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (887821097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 443910948 + 443910949.

It is an arithmetic number, because the mean of its divisors is an integer number (443910949).

Almost surely, 2^887821897 is an apocalyptic number.

It is an amenable number.

887821897 is a deficient number, since it is larger than the sum of its proper divisors (1).

887821897 is an equidigital number, since it uses as much as digits as its factorization.

887821897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3612672, while the sum is 58.

The square root of 887821897 is about 29796.3403289733. The cubic root of 887821897 is about 961.1148423534.

The spelling of 887821897 in words is "eight hundred eighty-seven million, eight hundred twenty-one thousand, eight hundred ninety-seven".