800600921 has 2 divisors, whose sum is σ = 800600922. Its totient is φ = 800600920.

The previous prime is 800600917. The next prime is 800600939. The reversal of 800600921 is 129006008.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 622752025 + 177848896 = 24955^2 + 13336^2 .

It is a cyclic number.

It is not a de Polignac number, because 800600921 - 2² = 800600917 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (800600971) 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 as a sum of consecutive naturals, namely, 400300460 + 400300461.

It is an arithmetic number, because the mean of its divisors is an integer number (400300461).

Almost surely, 2^800600921 is an apocalyptic number.

It is an amenable number.

800600921 is a deficient number, since it is larger than the sum of its proper divisors (1).

800600921 is an equidigital number, since it uses as much as digits as its factorization.

800600921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 800600921 is about 28294.8921362143. The cubic root of 800600921 is about 928.5501442323.

Adding to 800600921 its reverse (129006008), we get a palindrome (929606929).

The spelling of 800600921 in words is "eight hundred million, six hundred thousand, nine hundred twenty-one".