899318789 has 2 divisors, whose sum is σ = 899318790. Its totient is φ = 899318788.

The previous prime is 899318767. The next prime is 899318809. The reversal of 899318789 is 987813998.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 490268164 + 409050625 = 22142^2 + 20225^2 .

It is a cyclic number.

It is not a de Polignac number, because 899318789 - 2¹⁶ = 899253253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (899312789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449659394 + 449659395.

It is an arithmetic number, because the mean of its divisors is an integer number (449659395).

Almost surely, 2^899318789 is an apocalyptic number.

It is an amenable number.

899318789 is a deficient number, since it is larger than the sum of its proper divisors (1).

899318789 is an equidigital number, since it uses as much as digits as its factorization.

899318789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7838208, while the sum is 62.

The square root of 899318789 is about 29988.6443341476. The cubic root of 899318789 is about 965.2457297918.

The spelling of 899318789 in words is "eight hundred ninety-nine million, three hundred eighteen thousand, seven hundred eighty-nine".