801949 has 2 divisors, whose sum is σ = 801950. Its totient is φ = 801948.

The previous prime is 801947. The next prime is 801959. The reversal of 801949 is 949108.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 777924 + 24025 = 882^2 + 155^2 .

It is a cyclic number.

It is not a de Polignac number, because 801949 - 2¹ = 801947 is a prime.

Together with 801947, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 801949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (801947) 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, 400974 + 400975.

It is an arithmetic number, because the mean of its divisors is an integer number (400975).

2⁸⁰¹⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

801949 is a deficient number, since it is larger than the sum of its proper divisors (1).

801949 is an equidigital number, since it uses as much as digits as its factorization.

801949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 801949 is about 895.5160523408. The cubic root of 801949 is about 92.9071026730.

The spelling of 801949 in words is "eight hundred one thousand, nine hundred forty-nine".