628066291 has 2 divisors, whose sum is σ = 628066292. Its totient is φ = 628066290.

The previous prime is 628066289. The next prime is 628066297. The reversal of 628066291 is 192660826.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 628066291 - 2¹ = 628066289 is a prime.

Together with 628066289, it forms a pair of twin primes.

It is equal to p_32711899 and since 628066291 and 32711899 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (628066297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314033145 + 314033146.

It is an arithmetic number, because the mean of its divisors is an integer number (314033146).

Almost surely, 2^628066291 is an apocalyptic number.

628066291 is a deficient number, since it is larger than the sum of its proper divisors (1).

628066291 is an equidigital number, since it uses as much as digits as its factorization.

628066291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 628066291 is about 25061.2507868223. The cubic root of 628066291 is about 856.3839020100.

The spelling of 628066291 in words is "six hundred twenty-eight million, sixty-six thousand, two hundred ninety-one".