628397149 has 2 divisors, whose sum is σ = 628397150. Its totient is φ = 628397148.

The previous prime is 628397131. The next prime is 628397153. The reversal of 628397149 is 941793826.

628397149 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., 617174649 + 11222500 = 24843^2 + 3350^2 .

It is a cyclic number.

It is not a de Polignac number, because 628397149 - 2⁵ = 628397117 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 (628397179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314198574 + 314198575.

It is an arithmetic number, because the mean of its divisors is an integer number (314198575).

Almost surely, 2^628397149 is an apocalyptic number.

It is an amenable number.

628397149 is a deficient number, since it is larger than the sum of its proper divisors (1).

628397149 is an equidigital number, since it uses as much as digits as its factorization.

628397149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 49.

The square root of 628397149 is about 25067.8509050936. The cubic root of 628397149 is about 856.5342532972.

The spelling of 628397149 in words is "six hundred twenty-eight million, three hundred ninety-seven thousand, one hundred forty-nine".