628019477 has 2 divisors, whose sum is σ = 628019478. Its totient is φ = 628019476.

The previous prime is 628019473. The next prime is 628019479. The reversal of 628019477 is 774910826.

628019477 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., 558896881 + 69122596 = 23641^2 + 8314^2 .

It is a cyclic number.

It is not a de Polignac number, because 628019477 - 2² = 628019473 is a prime.

Together with 628019479, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628019471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314009738 + 314009739.

It is an arithmetic number, because the mean of its divisors is an integer number (314009739).

Almost surely, 2^628019477 is an apocalyptic number.

It is an amenable number.

628019477 is a deficient number, since it is larger than the sum of its proper divisors (1).

628019477 is an equidigital number, since it uses as much as digits as its factorization.

628019477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 169344, while the sum is 44.

The square root of 628019477 is about 25060.3167777265. The cubic root of 628019477 is about 856.3626241329.

The spelling of 628019477 in words is "six hundred twenty-eight million, nineteen thousand, four hundred seventy-seven".