629591 has 2 divisors, whose sum is σ = 629592. Its totient is φ = 629590.

The previous prime is 629569. The next prime is 629593. The reversal of 629591 is 195926.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-629591 is a prime.

Together with 629593, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (629593) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314795 + 314796.

It is an arithmetic number, because the mean of its divisors is an integer number (314796).

2⁶²⁹⁵⁹¹ is an apocalyptic number.

629591 is a deficient number, since it is larger than the sum of its proper divisors (1).

629591 is an equidigital number, since it uses as much as digits as its factorization.

629591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4860, while the sum is 32.

The square root of 629591 is about 793.4677057070. The cubic root of 629591 is about 85.7076334784.

The spelling of 629591 in words is "six hundred twenty-nine thousand, five hundred ninety-one".