800012491 has 2 divisors, whose sum is σ = 800012492. Its totient is φ = 800012490.

The previous prime is 800012489. The next prime is 800012501. The reversal of 800012491 is 194210008.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 800012491 - 2¹ = 800012489 is a prime.

Together with 800012489, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (800012431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400006245 + 400006246.

It is an arithmetic number, because the mean of its divisors is an integer number (400006246).

Almost surely, 2^800012491 is an apocalyptic number.

800012491 is a deficient number, since it is larger than the sum of its proper divisors (1).

800012491 is an equidigital number, since it uses as much as digits as its factorization.

800012491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 800012491 is about 28284.4920583701. The cubic root of 800012491 is about 928.3225982046.

Adding to 800012491 its reverse (194210008), we get a palindrome (994222499).

The spelling of 800012491 in words is "eight hundred million, twelve thousand, four hundred ninety-one".