628787227 has 2 divisors, whose sum is σ = 628787228. Its totient is φ = 628787226.

The previous prime is 628787221. The next prime is 628787267. The reversal of 628787227 is 722787826.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 628787227 - 2³ = 628787219 is a prime.

It is not a weakly prime, because it can be changed into another prime (628787221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314393613 + 314393614.

It is an arithmetic number, because the mean of its divisors is an integer number (314393614).

Almost surely, 2^628787227 is an apocalyptic number.

628787227 is a deficient number, since it is larger than the sum of its proper divisors (1).

628787227 is an equidigital number, since it uses as much as digits as its factorization.

628787227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1053696, while the sum is 49.

The square root of 628787227 is about 25075.6301416335. The cubic root of 628787227 is about 856.7114480637.

The spelling of 628787227 in words is "six hundred twenty-eight million, seven hundred eighty-seven thousand, two hundred twenty-seven".