626223889 has 2 divisors, whose sum is σ = 626223890. Its totient is φ = 626223888.

The previous prime is 626223881. The next prime is 626223943. The reversal of 626223889 is 988322626.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 624150289 + 2073600 = 24983^2 + 1440^2 .

It is a cyclic number.

It is not a de Polignac number, because 626223889 - 2³ = 626223881 is a prime.

It is not a weakly prime, because it can be changed into another prime (626223881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313111944 + 313111945.

It is an arithmetic number, because the mean of its divisors is an integer number (313111945).

Almost surely, 2^626223889 is an apocalyptic number.

It is an amenable number.

626223889 is a deficient number, since it is larger than the sum of its proper divisors (1).

626223889 is an equidigital number, since it uses as much as digits as its factorization.

626223889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 497664, while the sum is 46.

The square root of 626223889 is about 25024.4658084843. The cubic root of 626223889 is about 855.5456949826.

The spelling of 626223889 in words is "six hundred twenty-six million, two hundred twenty-three thousand, eight hundred eighty-nine".