629977 has 2 divisors, whose sum is σ = 629978. Its totient is φ = 629976.

The previous prime is 629963. The next prime is 629987. The reversal of 629977 is 779926.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 488601 + 141376 = 699^2 + 376^2 .

It is a cyclic number.

It is not a de Polignac number, because 629977 - 2¹⁵ = 597209 is a prime.

It is not a weakly prime, because it can be changed into another prime (629927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314988 + 314989.

It is an arithmetic number, because the mean of its divisors is an integer number (314989).

2⁶²⁹⁹⁷⁷ is an apocalyptic number.

It is an amenable number.

629977 is a deficient number, since it is larger than the sum of its proper divisors (1).

629977 is an equidigital number, since it uses as much as digits as its factorization.

629977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47628, while the sum is 40.

The square root of 629977 is about 793.7109045490. The cubic root of 629977 is about 85.7251455817.

The spelling of 629977 in words is "six hundred twenty-nine thousand, nine hundred seventy-seven".