629609 has 2 divisors, whose sum is σ = 629610. Its totient is φ = 629608.

The previous prime is 629593. The next prime is 629611. The reversal of 629609 is 906926.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 394384 + 235225 = 628^2 + 485^2 .

It is a cyclic number.

It is not a de Polignac number, because 629609 - 2⁴ = 629593 is a prime.

Together with 629611, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (629689) 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, 314804 + 314805.

It is an arithmetic number, because the mean of its divisors is an integer number (314805).

2⁶²⁹⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

629609 is a deficient number, since it is larger than the sum of its proper divisors (1).

629609 is an equidigital number, since it uses as much as digits as its factorization.

629609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 629609 is about 793.4790482426. The cubic root of 629609 is about 85.7084502641.

The spelling of 629609 in words is "six hundred twenty-nine thousand, six hundred nine".