828396139 has 2 divisors, whose sum is σ = 828396140. Its totient is φ = 828396138.

The previous prime is 828396113. The next prime is 828396157. The reversal of 828396139 is 931693828.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 828396139 - 2⁷ = 828396011 is a prime.

It is a super-2 number, since 2×828396139² = 1372480326220214642, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 828396092 and 828396101.

It is not a weakly prime, because it can be changed into another prime (828396109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 414198069 + 414198070.

It is an arithmetic number, because the mean of its divisors is an integer number (414198070).

Almost surely, 2^828396139 is an apocalyptic number.

828396139 is a deficient number, since it is larger than the sum of its proper divisors (1).

828396139 is an equidigital number, since it uses as much as digits as its factorization.

828396139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 559872, while the sum is 49.

The square root of 828396139 is about 28781.8717077260. The cubic root of 828396139 is about 939.1739154790.

The spelling of 828396139 in words is "eight hundred twenty-eight million, three hundred ninety-six thousand, one hundred thirty-nine".