312829999 has 2 divisors, whose sum is σ = 312830000. Its totient is φ = 312829998.

The previous prime is 312829997. The next prime is 312830017. The reversal of 312829999 is 999928213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 312829999 - 2¹ = 312829997 is a prime.

Together with 312829997, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312829997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156414999 + 156415000.

It is an arithmetic number, because the mean of its divisors is an integer number (156415000).

Almost surely, 2^312829999 is an apocalyptic number.

312829999 is a deficient number, since it is larger than the sum of its proper divisors (1).

312829999 is an equidigital number, since it uses as much as digits as its factorization.

312829999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 629856, while the sum is 52.

The square root of 312829999 is about 17687.0008480805. Note that the first 3 decimals coincide. The cubic root of 312829999 is about 678.8431881431.

The spelling of 312829999 in words is "three hundred twelve million, eight hundred twenty-nine thousand, nine hundred ninety-nine".