802170881 has 2 divisors, whose sum is σ = 802170882. Its totient is φ = 802170880.

The previous prime is 802170877. The next prime is 802170913. The reversal of 802170881 is 188071208.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 792929281 + 9241600 = 28159^2 + 3040^2 .

It is a cyclic number.

It is not a de Polignac number, because 802170881 - 2² = 802170877 is a prime.

It is a super-2 number, since 2×802170881² = 1286956244648632322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (802170821) 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, 401085440 + 401085441.

It is an arithmetic number, because the mean of its divisors is an integer number (401085441).

Almost surely, 2^802170881 is an apocalyptic number.

It is an amenable number.

802170881 is a deficient number, since it is larger than the sum of its proper divisors (1).

802170881 is an equidigital number, since it uses as much as digits as its factorization.

802170881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7168, while the sum is 35.

The square root of 802170881 is about 28322.6213652621. The cubic root of 802170881 is about 929.1567030840.

The spelling of 802170881 in words is "eight hundred two million, one hundred seventy thousand, eight hundred eighty-one".