628422229 has 2 divisors, whose sum is σ = 628422230. Its totient is φ = 628422228.

The previous prime is 628422227. The next prime is 628422233. The reversal of 628422229 is 922224826.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 410062500 + 218359729 = 20250^2 + 14777^2 .

It is a cyclic number.

It is not a de Polignac number, because 628422229 - 2¹ = 628422227 is a prime.

Together with 628422227, 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 (628422227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314211114 + 314211115.

It is an arithmetic number, because the mean of its divisors is an integer number (314211115).

Almost surely, 2^628422229 is an apocalyptic number.

It is an amenable number.

628422229 is a deficient number, since it is larger than the sum of its proper divisors (1).

628422229 is an equidigital number, since it uses as much as digits as its factorization.

628422229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55296, while the sum is 37.

The square root of 628422229 is about 25068.3511424266. The cubic root of 628422229 is about 856.5456482107.

The spelling of 628422229 in words is "six hundred twenty-eight million, four hundred twenty-two thousand, two hundred twenty-nine".