628271377 has 2 divisors, whose sum is σ = 628271378. Its totient is φ = 628271376.

The previous prime is 628271311. The next prime is 628271401. The reversal of 628271377 is 773172826.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 566868481 + 61402896 = 23809^2 + 7836^2 .

It is a cyclic number.

It is not a de Polignac number, because 628271377 - 2¹¹ = 628269329 is a prime.

It is a super-2 number, since 2×628271377² = 789449846314952258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (628271477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314135688 + 314135689.

It is an arithmetic number, because the mean of its divisors is an integer number (314135689).

Almost surely, 2^628271377 is an apocalyptic number.

It is an amenable number.

628271377 is a deficient number, since it is larger than the sum of its proper divisors (1).

628271377 is an equidigital number, since it uses as much as digits as its factorization.

628271377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 197568, while the sum is 43.

The square root of 628271377 is about 25065.3421480737. The cubic root of 628271377 is about 856.4771051417.

The spelling of 628271377 in words is "six hundred twenty-eight million, two hundred seventy-one thousand, three hundred seventy-seven".