829670399 has 2 divisors, whose sum is σ = 829670400. Its totient is φ = 829670398.

The previous prime is 829670393. The next prime is 829670441. The reversal of 829670399 is 993076928.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 829670399 - 2¹² = 829666303 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 829670399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (829670393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 414835199 + 414835200.

It is an arithmetic number, because the mean of its divisors is an integer number (414835200).

Almost surely, 2^829670399 is an apocalyptic number.

829670399 is a deficient number, since it is larger than the sum of its proper divisors (1).

829670399 is an equidigital number, since it uses as much as digits as its factorization.

829670399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1469664, while the sum is 53.

The square root of 829670399 is about 28803.9997049021. Note that the first 3 decimals coincide. The cubic root of 829670399 is about 939.6552225077.

The spelling of 829670399 in words is "eight hundred twenty-nine million, six hundred seventy thousand, three hundred ninety-nine".