899000689 has 2 divisors, whose sum is σ = 899000690. Its totient is φ = 899000688.

The previous prime is 899000671. The next prime is 899000693. The reversal of 899000689 is 986000998.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 688170289 + 210830400 = 26233^2 + 14520^2 .

It is a cyclic number.

It is not a de Polignac number, because 899000689 - 2⁵ = 899000657 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (899000629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449500344 + 449500345.

It is an arithmetic number, because the mean of its divisors is an integer number (449500345).

Almost surely, 2^899000689 is an apocalyptic number.

It is an amenable number.

899000689 is a deficient number, since it is larger than the sum of its proper divisors (1).

899000689 is an equidigital number, since it uses as much as digits as its factorization.

899000689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 49.

The square root of 899000689 is about 29983.3401908460. The cubic root of 899000689 is about 965.1319099838.

The spelling of 899000689 in words is "eight hundred ninety-nine million, six hundred eighty-nine", and thus it is an aban number.