899868919 has 2 divisors, whose sum is σ = 899868920. Its totient is φ = 899868918.

The previous prime is 899868917. The next prime is 899868923. The reversal of 899868919 is 919868998.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 899868919 - 2¹ = 899868917 is a prime.

It is a super-2 number, since 2×899868919² = 1619528142764457122, which contains 22 as substring.

Together with 899868917, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (899868913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449934459 + 449934460.

It is an arithmetic number, because the mean of its divisors is an integer number (449934460).

Almost surely, 2^899868919 is an apocalyptic number.

899868919 is a deficient number, since it is larger than the sum of its proper divisors (1).

899868919 is an equidigital number, since it uses as much as digits as its factorization.

899868919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20155392, while the sum is 67.

The square root of 899868919 is about 29997.8152371135. The cubic root of 899868919 is about 965.4425092506.

The spelling of 899868919 in words is "eight hundred ninety-nine million, eight hundred sixty-eight thousand, nine hundred nineteen".