628734277 has 2 divisors, whose sum is σ = 628734278. Its totient is φ = 628734276.

The previous prime is 628734269. The next prime is 628734287. The reversal of 628734277 is 772437826.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 411643521 + 217090756 = 20289^2 + 14734^2 .

It is a cyclic number.

It is not a de Polignac number, because 628734277 - 2³ = 628734269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628734287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314367138 + 314367139.

It is an arithmetic number, because the mean of its divisors is an integer number (314367139).

Almost surely, 2^628734277 is an apocalyptic number.

It is an amenable number.

628734277 is a deficient number, since it is larger than the sum of its proper divisors (1).

628734277 is an equidigital number, since it uses as much as digits as its factorization.

628734277 is an evil number, because the sum of its binary digits is even.

The product of its digits is 790272, while the sum is 46.

The square root of 628734277 is about 25074.5743134355. The cubic root of 628734277 is about 856.6873995766.

The spelling of 628734277 in words is "six hundred twenty-eight million, seven hundred thirty-four thousand, two hundred seventy-seven".