629986009 has 2 divisors, whose sum is σ = 629986010. Its totient is φ = 629986008.

The previous prime is 629986001. The next prime is 629986057. The reversal of 629986009 is 900689926.

It is a happy number.

629986009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 447195609 + 182790400 = 21147^2 + 13520^2 .

It is a cyclic number.

It is not a de Polignac number, because 629986009 - 2³ = 629986001 is a prime.

It is not a weakly prime, because it can be changed into another prime (629986001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314993004 + 314993005.

It is an arithmetic number, because the mean of its divisors is an integer number (314993005).

Almost surely, 2^629986009 is an apocalyptic number.

It is an amenable number.

629986009 is a deficient number, since it is larger than the sum of its proper divisors (1).

629986009 is an equidigital number, since it uses as much as digits as its factorization.

629986009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 419904, while the sum is 49.

The square root of 629986009 is about 25099.5220870837. The cubic root of 629986009 is about 857.2555421785.

The spelling of 629986009 in words is "six hundred twenty-nine million, nine hundred eighty-six thousand, nine".