628220149 has 2 divisors, whose sum is σ = 628220150. Its totient is φ = 628220148.

The previous prime is 628220147. The next prime is 628220191. The reversal of 628220149 is 941022826.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 551780100 + 76440049 = 23490^2 + 8743^2 .

It is a cyclic number.

It is not a de Polignac number, because 628220149 - 2¹ = 628220147 is a prime.

Together with 628220147, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628220143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314110074 + 314110075.

It is an arithmetic number, because the mean of its divisors is an integer number (314110075).

Almost surely, 2^628220149 is an apocalyptic number.

It is an amenable number.

628220149 is a deficient number, since it is larger than the sum of its proper divisors (1).

628220149 is an equidigital number, since it uses as much as digits as its factorization.

628220149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 628220149 is about 25064.3202381393. The cubic root of 628220149 is about 856.4538260284.

The spelling of 628220149 in words is "six hundred twenty-eight million, two hundred twenty thousand, one hundred forty-nine".