801813869 has 2 divisors, whose sum is σ = 801813870. Its totient is φ = 801813868.

The previous prime is 801813827. The next prime is 801813871. The reversal of 801813869 is 968318108.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 547794025 + 254019844 = 23405^2 + 15938^2 .

It is a cyclic number.

It is not a de Polignac number, because 801813869 - 2²⁸ = 533378413 is a prime.

It is a super-2 number, since 2×801813869² = 1285810961041498322, which contains 22 as substring.

Together with 801813871, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (801813899) 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, 400906934 + 400906935.

It is an arithmetic number, because the mean of its divisors is an integer number (400906935).

Almost surely, 2^801813869 is an apocalyptic number.

It is an amenable number.

801813869 is a deficient number, since it is larger than the sum of its proper divisors (1).

801813869 is an equidigital number, since it uses as much as digits as its factorization.

801813869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 44.

The square root of 801813869 is about 28316.3180692688. The cubic root of 801813869 is about 929.0188399743.

The spelling of 801813869 in words is "eight hundred one million, eight hundred thirteen thousand, eight hundred sixty-nine".