628280117 has 2 divisors, whose sum is σ = 628280118. Its totient is φ = 628280116.

The previous prime is 628280063. The next prime is 628280123. The reversal of 628280117 is 711082826.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 606833956 + 21446161 = 24634^2 + 4631^2 .

It is a cyclic number.

It is not a de Polignac number, because 628280117 - 2¹⁶ = 628214581 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628280197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314140058 + 314140059.

It is an arithmetic number, because the mean of its divisors is an integer number (314140059).

Almost surely, 2^628280117 is an apocalyptic number.

It is an amenable number.

628280117 is a deficient number, since it is larger than the sum of its proper divisors (1).

628280117 is an equidigital number, since it uses as much as digits as its factorization.

628280117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 628280117 is about 25065.5164917861. The cubic root of 628280117 is about 856.4810766607.

The spelling of 628280117 in words is "six hundred twenty-eight million, two hundred eighty thousand, one hundred seventeen".