899351009 has 2 divisors, whose sum is σ = 899351010. Its totient is φ = 899351008.

The previous prime is 899351003. The next prime is 899351029. The reversal of 899351009 is 900153998.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 898320784 + 1030225 = 29972^2 + 1015^2 .

It is a cyclic number.

It is not a de Polignac number, because 899351009 - 2¹⁶ = 899285473 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (899351003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449675504 + 449675505.

It is an arithmetic number, because the mean of its divisors is an integer number (449675505).

Almost surely, 2^899351009 is an apocalyptic number.

It is an amenable number.

899351009 is a deficient number, since it is larger than the sum of its proper divisors (1).

899351009 is an equidigital number, since it uses as much as digits as its factorization.

899351009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87480, while the sum is 44.

The square root of 899351009 is about 29989.1815326794. The cubic root of 899351009 is about 965.2572569782.

The spelling of 899351009 in words is "eight hundred ninety-nine million, three hundred fifty-one thousand, nine".