628748693 has 2 divisors, whose sum is σ = 628748694. Its totient is φ = 628748692.

The previous prime is 628748671. The next prime is 628748707. The reversal of 628748693 is 396847826.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 613949284 + 14799409 = 24778^2 + 3847^2 .

It is a cyclic number.

It is not a de Polignac number, because 628748693 - 2⁶ = 628748629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628748633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314374346 + 314374347.

It is an arithmetic number, because the mean of its divisors is an integer number (314374347).

Almost surely, 2^628748693 is an apocalyptic number.

It is an amenable number.

628748693 is a deficient number, since it is larger than the sum of its proper divisors (1).

628748693 is an equidigital number, since it uses as much as digits as its factorization.

628748693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3483648, while the sum is 53.

The square root of 628748693 is about 25074.8617742950. The cubic root of 628748693 is about 856.6939470756.

The spelling of 628748693 in words is "six hundred twenty-eight million, seven hundred forty-eight thousand, six hundred ninety-three".