800819401 has 4 divisors (see below), whose sum is σ = 819443152. Its totient is φ = 782195652.

The previous prime is 800819387. The next prime is 800819413. The reversal of 800819401 is 104918008.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 800819401 - 2¹⁵ = 800786633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (800819471) 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 3 ways as a sum of consecutive naturals, for example, 9311811 + ... + 9311896.

It is an arithmetic number, because the mean of its divisors is an integer number (204860788).

Almost surely, 2^800819401 is an apocalyptic number.

It is an amenable number.

800819401 is a deficient number, since it is larger than the sum of its proper divisors (18623751).

800819401 is a wasteful number, since it uses less digits than its factorization.

800819401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18623750.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 800819401 is about 28298.7526403550. The cubic root of 800819401 is about 928.6346021185.

The spelling of 800819401 in words is "eight hundred million, eight hundred nineteen thousand, four hundred one".