628625911 has 2 divisors, whose sum is σ = 628625912. Its totient is φ = 628625910.

The previous prime is 628625869. The next prime is 628625917. The reversal of 628625911 is 119526826.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 628625911 - 2¹³ = 628617719 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628625917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314312955 + 314312956.

It is an arithmetic number, because the mean of its divisors is an integer number (314312956).

Almost surely, 2^628625911 is an apocalyptic number.

628625911 is a deficient number, since it is larger than the sum of its proper divisors (1).

628625911 is an equidigital number, since it uses as much as digits as its factorization.

628625911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 40.

The square root of 628625911 is about 25072.4133461460. The cubic root of 628625911 is about 856.6381784010.

The spelling of 628625911 in words is "six hundred twenty-eight million, six hundred twenty-five thousand, nine hundred eleven".