818349923 has 2 divisors, whose sum is σ = 818349924. Its totient is φ = 818349922.

The previous prime is 818349919. The next prime is 818349941. The reversal of 818349923 is 329943818.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 818349923 - 2² = 818349919 is a prime.

It is not a weakly prime, because it can be changed into another prime (818349943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409174961 + 409174962.

It is an arithmetic number, because the mean of its divisors is an integer number (409174962).

Almost surely, 2^818349923 is an apocalyptic number.

818349923 is a deficient number, since it is larger than the sum of its proper divisors (1).

818349923 is an equidigital number, since it uses as much as digits as its factorization.

818349923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 47.

The square root of 818349923 is about 28606.8160234585. The cubic root of 818349923 is about 935.3619131423.

The spelling of 818349923 in words is "eight hundred eighteen million, three hundred forty-nine thousand, nine hundred twenty-three".