828611969 has 2 divisors, whose sum is σ = 828611970. Its totient is φ = 828611968.

The previous prime is 828611941. The next prime is 828612013. The reversal of 828611969 is 969116828.

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., 773674225 + 54937744 = 27815^2 + 7412^2 .

It is a cyclic number.

It is not a de Polignac number, because 828611969 - 2¹² = 828607873 is a prime.

It is a super-2 number, since 2×828611969² = 1373195590340113922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (828611669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 414305984 + 414305985.

It is an arithmetic number, because the mean of its divisors is an integer number (414305985).

Almost surely, 2^828611969 is an apocalyptic number.

It is an amenable number.

828611969 is a deficient number, since it is larger than the sum of its proper divisors (1).

828611969 is an equidigital number, since it uses as much as digits as its factorization.

828611969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 50.

The square root of 828611969 is about 28785.6208722341. The cubic root of 828611969 is about 939.2554723957.

The spelling of 828611969 in words is "eight hundred twenty-eight million, six hundred eleven thousand, nine hundred sixty-nine".