828396109 has 2 divisors, whose sum is σ = 828396110. Its totient is φ = 828396108.

The previous prime is 828396097. The next prime is 828396113. The reversal of 828396109 is 901693828.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 822255625 + 6140484 = 28675^2 + 2478^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-828396109 is a prime.

It is a super-2 number, since 2×828396109² = 1372480226812679762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (828396139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 414198054 + 414198055.

It is an arithmetic number, because the mean of its divisors is an integer number (414198055).

Almost surely, 2^828396109 is an apocalyptic number.

It is an amenable number.

828396109 is a deficient number, since it is larger than the sum of its proper divisors (1).

828396109 is an equidigital number, since it uses as much as digits as its factorization.

828396109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 828396109 is about 28781.8711865646. The cubic root of 828396109 is about 939.1739041417.

The spelling of 828396109 in words is "eight hundred twenty-eight million, three hundred ninety-six thousand, one hundred nine".