801948021 has 64 divisors (see below), whose sum is σ = 1345683456. Its totient is φ = 414259200.

The previous prime is 801947999. The next prime is 801948023. The reversal of 801948021 is 120849108.

It is not a de Polignac number, because 801948021 - 2¹¹ = 801945973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (801948023) 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 in 63 ways as a sum of consecutive naturals, for example, 2578456 + ... + 2578766.

It is an arithmetic number, because the mean of its divisors is an integer number (21026304).

Almost surely, 2^801948021 is an apocalyptic number.

It is an amenable number.

801948021 is a deficient number, since it is larger than the sum of its proper divisors (543735435).

801948021 is a wasteful number, since it uses less digits than its factorization.

801948021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602.

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 801948021 is about 28318.6867809932. The cubic root of 801948021 is about 929.0706486672.

The spelling of 801948021 in words is "eight hundred one million, nine hundred forty-eight thousand, twenty-one".