818165837 has 2 divisors, whose sum is σ = 818165838. Its totient is φ = 818165836.

The previous prime is 818165833. The next prime is 818165869. The reversal of 818165837 is 738561818.

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., 816759241 + 1406596 = 28579^2 + 1186^2 .

It is a cyclic number.

It is not a de Polignac number, because 818165837 - 2² = 818165833 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 818165791 and 818165800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (818165833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409082918 + 409082919.

It is an arithmetic number, because the mean of its divisors is an integer number (409082919).

Almost surely, 2^818165837 is an apocalyptic number.

It is an amenable number.

818165837 is a deficient number, since it is larger than the sum of its proper divisors (1).

818165837 is an equidigital number, since it uses as much as digits as its factorization.

818165837 is an evil number, because the sum of its binary digits is even.

The product of its digits is 322560, while the sum is 47.

The square root of 818165837 is about 28603.5983225887. The cubic root of 818165837 is about 935.2917720202.

The spelling of 818165837 in words is "eight hundred eighteen million, one hundred sixty-five thousand, eight hundred thirty-seven".