629986057 has 2 divisors, whose sum is σ = 629986058. Its totient is φ = 629986056.

The previous prime is 629986009. The next prime is 629986067. The reversal of 629986057 is 750689926.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 580761801 + 49224256 = 24099^2 + 7016^2 .

It is a cyclic number.

It is not a de Polignac number, because 629986057 - 2⁷ = 629985929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 629985995 and 629986013.

It is not a weakly prime, because it can be changed into another prime (629986067) 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, 314993028 + 314993029.

It is an arithmetic number, because the mean of its divisors is an integer number (314993029).

Almost surely, 2^629986057 is an apocalyptic number.

It is an amenable number.

629986057 is a deficient number, since it is larger than the sum of its proper divisors (1).

629986057 is an equidigital number, since it uses as much as digits as its factorization.

629986057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1632960, while the sum is 52.

The square root of 629986057 is about 25099.5230432771. The cubic root of 629986057 is about 857.2555639506.

The spelling of 629986057 in words is "six hundred twenty-nine million, nine hundred eighty-six thousand, fifty-seven".