801819049 has 2 divisors, whose sum is σ = 801819050. Its totient is φ = 801819048.

The previous prime is 801819043. The next prime is 801819097. The reversal of 801819049 is 940918108.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 409779049 + 392040000 = 20243^2 + 19800^2 .

It is a cyclic number.

It is not a de Polignac number, because 801819049 - 2⁵ = 801819017 is a prime.

It is not a weakly prime, because it can be changed into another prime (801819043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400909524 + 400909525.

It is an arithmetic number, because the mean of its divisors is an integer number (400909525).

Almost surely, 2^801819049 is an apocalyptic number.

It is an amenable number.

801819049 is a deficient number, since it is larger than the sum of its proper divisors (1).

801819049 is an equidigital number, since it uses as much as digits as its factorization.

801819049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 40.

The square root of 801819049 is about 28316.4095358151. The cubic root of 801819049 is about 929.0208405663.

The spelling of 801819049 in words is "eight hundred one million, eight hundred nineteen thousand, forty-nine".