629999899 has 2 divisors, whose sum is σ = 629999900. Its totient is φ = 629999898.

The previous prime is 629999873. The next prime is 629999917. The reversal of 629999899 is 998999926.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 629999899 - 2¹⁹ = 629475611 is a prime.

It is not a weakly prime, because it can be changed into another prime (629999819) 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, 314999949 + 314999950.

It is an arithmetic number, because the mean of its divisors is an integer number (314999950).

Almost surely, 2^629999899 is an apocalyptic number.

629999899 is a deficient number, since it is larger than the sum of its proper divisors (1).

629999899 is an equidigital number, since it uses as much as digits as its factorization.

629999899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51018336, while the sum is 70.

The square root of 629999899 is about 25099.7987840540. The cubic root of 629999899 is about 857.2618424200.

The spelling of 629999899 in words is "six hundred twenty-nine million, nine hundred ninety-nine thousand, eight hundred ninety-nine".