626009 has 2 divisors, whose sum is σ = 626010. Its totient is φ = 626008.

The previous prime is 625997. The next prime is 626011. The reversal of 626009 is 900626.

626009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 403225 + 222784 = 635^2 + 472^2 .

It is a cyclic number.

It is not a de Polignac number, because 626009 - 2¹² = 621913 is a prime.

Together with 626011, 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 (626609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313004 + 313005.

It is an arithmetic number, because the mean of its divisors is an integer number (313005).

2⁶²⁶⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

626009 is a deficient number, since it is larger than the sum of its proper divisors (1).

626009 is an equidigital number, since it uses as much as digits as its factorization.

626009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 626009 is about 791.2073053252. The cubic root of 626009 is about 85.5447823494.

The spelling of 626009 in words is "six hundred twenty-six thousand, nine".