628851397 has 2 divisors, whose sum is σ = 628851398. Its totient is φ = 628851396.

The previous prime is 628851319. The next prime is 628851449. The reversal of 628851397 is 793158826.

628851397 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., 622302916 + 6548481 = 24946^2 + 2559^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-628851397 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 628851397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628851697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314425698 + 314425699.

It is an arithmetic number, because the mean of its divisors is an integer number (314425699).

Almost surely, 2^628851397 is an apocalyptic number.

It is an amenable number.

628851397 is a deficient number, since it is larger than the sum of its proper divisors (1).

628851397 is an equidigital number, since it uses as much as digits as its factorization.

628851397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 49.

The square root of 628851397 is about 25076.9096381512. The cubic root of 628851397 is about 856.7405905681.

The spelling of 628851397 in words is "six hundred twenty-eight million, eight hundred fifty-one thousand, three hundred ninety-seven".