800651001 has 4 divisors (see below), whose sum is σ = 1067534672. Its totient is φ = 533767332.

The previous prime is 800650987. The next prime is 800651009. The reversal of 800651001 is 100156008.

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 not a de Polignac number, because 800651001 - 2¹⁰ = 800649977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (800651009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133441831 + ... + 133441836.

It is an arithmetic number, because the mean of its divisors is an integer number (266883668).

Almost surely, 2^800651001 is an apocalyptic number.

It is an amenable number.

800651001 is a deficient number, since it is larger than the sum of its proper divisors (266883671).

800651001 is a wasteful number, since it uses less digits than its factorization.

800651001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266883670.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 800651001 is about 28295.7770877564. Note that the first 3 decimals coincide. The cubic root of 800651001 is about 928.5695050318.

The spelling of 800651001 in words is "eight hundred million, six hundred fifty-one thousand, one".