898010809 has 2 divisors, whose sum is σ = 898010810. Its totient is φ = 898010808.

The previous prime is 898010791. The next prime is 898010819. The reversal of 898010809 is 908010898.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 895685184 + 2325625 = 29928^2 + 1525^2 .

It is a cyclic number.

It is not a de Polignac number, because 898010809 - 2⁷ = 898010681 is a prime.

It is not a weakly prime, because it can be changed into another prime (898010819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449005404 + 449005405.

It is an arithmetic number, because the mean of its divisors is an integer number (449005405).

Almost surely, 2^898010809 is an apocalyptic number.

It is an amenable number.

898010809 is a deficient number, since it is larger than the sum of its proper divisors (1).

898010809 is an equidigital number, since it uses as much as digits as its factorization.

898010809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 43.

The square root of 898010809 is about 29966.8284775016. The cubic root of 898010809 is about 964.7775477648. Note that the first 3 decimals are identical.

The spelling of 898010809 in words is "eight hundred ninety-eight million, ten thousand, eight hundred nine".