812828399 has 2 divisors, whose sum is σ = 812828400. Its totient is φ = 812828398.

The previous prime is 812828381. The next prime is 812828411. The reversal of 812828399 is 993828218.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 812828399 - 2²⁰ = 811779823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (812822399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406414199 + 406414200.

It is an arithmetic number, because the mean of its divisors is an integer number (406414200).

Almost surely, 2^812828399 is an apocalyptic number.

812828399 is a deficient number, since it is larger than the sum of its proper divisors (1).

812828399 is an equidigital number, since it uses as much as digits as its factorization.

812828399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497664, while the sum is 50.

The square root of 812828399 is about 28510.1455450512. The cubic root of 812828399 is about 933.2534905197.

The spelling of 812828399 in words is "eight hundred twelve million, eight hundred twenty-eight thousand, three hundred ninety-nine".