628235939 has 2 divisors, whose sum is σ = 628235940. Its totient is φ = 628235938.

The previous prime is 628235917. The next prime is 628235941. The reversal of 628235939 is 939532826.

It is a happy number.

628235939 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-628235939 is a prime.

Together with 628235941, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 628235893 and 628235902.

It is not a weakly prime, because it can be changed into another prime (628235039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314117969 + 314117970.

It is an arithmetic number, because the mean of its divisors is an integer number (314117970).

Almost surely, 2^628235939 is an apocalyptic number.

628235939 is a deficient number, since it is larger than the sum of its proper divisors (1).

628235939 is an equidigital number, since it uses as much as digits as its factorization.

628235939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 699840, while the sum is 47.

The square root of 628235939 is about 25064.6352257518. The cubic root of 628235939 is about 856.4610014815.

The spelling of 628235939 in words is "six hundred twenty-eight million, two hundred thirty-five thousand, nine hundred thirty-nine".