812969 has 2 divisors, whose sum is σ = 812970. Its totient is φ = 812968.

The previous prime is 812963. The next prime is 813013. The reversal of 812969 is 969218.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 619369 + 193600 = 787^2 + 440^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-812969 is a prime.

It is a super-2 number, since 2×812969² = 1321837189922, 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 not a weakly prime, because it can be changed into another prime (812963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406484 + 406485.

It is an arithmetic number, because the mean of its divisors is an integer number (406485).

2⁸¹²⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

812969 is a deficient number, since it is larger than the sum of its proper divisors (1).

812969 is an equidigital number, since it uses as much as digits as its factorization.

812969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 35.

The square root of 812969 is about 901.6479357266. The cubic root of 812969 is about 93.3307298027.

The spelling of 812969 in words is "eight hundred twelve thousand, nine hundred sixty-nine".