818912849 has 2 divisors, whose sum is σ = 818912850. Its totient is φ = 818912848.

The previous prime is 818912827. The next prime is 818912873. The reversal of 818912849 is 948219818.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 721298449 + 97614400 = 26857^2 + 9880^2 .

It is a cyclic number.

It is not a de Polignac number, because 818912849 - 2²⁸ = 550477393 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 818912797 and 818912806.

It is not a weakly prime, because it can be changed into another prime (818912879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409456424 + 409456425.

It is an arithmetic number, because the mean of its divisors is an integer number (409456425).

Almost surely, 2^818912849 is an apocalyptic number.

It is an amenable number.

818912849 is a deficient number, since it is larger than the sum of its proper divisors (1).

818912849 is an equidigital number, since it uses as much as digits as its factorization.

818912849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 331776, while the sum is 50.

The square root of 818912849 is about 28616.6533508026. The cubic root of 818912849 is about 935.5763360274.

The spelling of 818912849 in words is "eight hundred eighteen million, nine hundred twelve thousand, eight hundred forty-nine".