818969 has 2 divisors, whose sum is σ = 818970. Its totient is φ = 818968.

The previous prime is 818963. The next prime is 818977. The reversal of 818969 is 969818.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 620944 + 198025 = 788^2 + 445^2 .

It is a cyclic number.

It is not a de Polignac number, because 818969 - 2¹² = 814873 is a prime.

It is a super-2 number, since 2×818969² = 1341420445922, which contains 22 as substring.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a plaindrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 818969.

It is not a weakly prime, because it can be changed into another prime (818963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409484 + 409485.

It is an arithmetic number, because the mean of its divisors is an integer number (409485).

2⁸¹⁸⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

818969 is a deficient number, since it is larger than the sum of its proper divisors (1).

818969 is an equidigital number, since it uses as much as digits as its factorization.

818969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 41.

The square root of 818969 is about 904.9690602446. The cubic root of 818969 is about 93.5597718989.

The spelling of 818969 in words is "eight hundred eighteen thousand, nine hundred sixty-nine".