628276277 has 2 divisors, whose sum is σ = 628276278. Its totient is φ = 628276276.

The previous prime is 628276261. The next prime is 628276279. The reversal of 628276277 is 772672826.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 365803876 + 262472401 = 19126^2 + 16201^2 .

It is a cyclic number.

It is not a de Polignac number, because 628276277 - 2⁴ = 628276261 is a prime.

Together with 628276279, 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 (628276279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314138138 + 314138139.

It is an arithmetic number, because the mean of its divisors is an integer number (314138139).

Almost surely, 2^628276277 is an apocalyptic number.

It is an amenable number.

628276277 is a deficient number, since it is larger than the sum of its proper divisors (1).

628276277 is an equidigital number, since it uses as much as digits as its factorization.

628276277 is an evil number, because the sum of its binary digits is even.

The product of its digits is 790272, while the sum is 47.

The square root of 628276277 is about 25065.4398924096. The cubic root of 628276277 is about 856.4793317416.

The spelling of 628276277 in words is "six hundred twenty-eight million, two hundred seventy-six thousand, two hundred seventy-seven".