802111001 has 2 divisors, whose sum is σ = 802111002. Its totient is φ = 802111000.

The previous prime is 802110997. The next prime is 802111031. The reversal of 802111001 is 100111208.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 579653776 + 222457225 = 24076^2 + 14915^2 .

It is a cyclic number.

It is not a de Polignac number, because 802111001 - 2² = 802110997 is a prime.

It is not a weakly prime, because it can be changed into another prime (802111031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 401055500 + 401055501.

It is an arithmetic number, because the mean of its divisors is an integer number (401055501).

Almost surely, 2^802111001 is an apocalyptic number.

It is an amenable number.

802111001 is a deficient number, since it is larger than the sum of its proper divisors (1).

802111001 is an equidigital number, since it uses as much as digits as its factorization.

802111001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 14.

The square root of 802111001 is about 28321.5642399921. The cubic root of 802111001 is about 929.1335827867.

Adding to 802111001 its reverse (100111208), we get a palindrome (902222209).

The spelling of 802111001 in words is "eight hundred two million, one hundred eleven thousand, one".