899318261 has 2 divisors, whose sum is σ = 899318262. Its totient is φ = 899318260.

The previous prime is 899318221. The next prime is 899318281. The reversal of 899318261 is 162813998.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 511031236 + 388287025 = 22606^2 + 19705^2 .

It is a cyclic number.

It is not a de Polignac number, because 899318261 - 2¹⁴ = 899301877 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (899318221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449659130 + 449659131.

It is an arithmetic number, because the mean of its divisors is an integer number (449659131).

Almost surely, 2^899318261 is an apocalyptic number.

It is an amenable number.

899318261 is a deficient number, since it is larger than the sum of its proper divisors (1).

899318261 is an equidigital number, since it uses as much as digits as its factorization.

899318261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 47.

The square root of 899318261 is about 29988.6355308140. The cubic root of 899318261 is about 965.2455408896.

The spelling of 899318261 in words is "eight hundred ninety-nine million, three hundred eighteen thousand, two hundred sixty-one".