899808671 has 2 divisors, whose sum is σ = 899808672. Its totient is φ = 899808670.

The previous prime is 899808667. The next prime is 899808677. The reversal of 899808671 is 176808998.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 899808671 - 2² = 899808667 is a prime.

It is a Sophie Germain prime.

It is equal to p_45999965 and since 899808671 and 45999965 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (899808677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449904335 + 449904336.

It is an arithmetic number, because the mean of its divisors is an integer number (449904336).

Almost surely, 2^899808671 is an apocalyptic number.

899808671 is a deficient number, since it is larger than the sum of its proper divisors (1).

899808671 is an equidigital number, since it uses as much as digits as its factorization.

899808671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1741824, while the sum is 56.

The square root of 899808671 is about 29996.8110138395. The cubic root of 899808671 is about 965.4209626759.

The spelling of 899808671 in words is "eight hundred ninety-nine million, eight hundred eight thousand, six hundred seventy-one".