628682291 has 2 divisors, whose sum is σ = 628682292. Its totient is φ = 628682290.

The previous prime is 628682273. The next prime is 628682333. The reversal of 628682291 is 192286826.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 628682291 - 2¹⁴ = 628665907 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (628682221) 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, 314341145 + 314341146.

It is an arithmetic number, because the mean of its divisors is an integer number (314341146).

Almost surely, 2^628682291 is an apocalyptic number.

628682291 is a deficient number, since it is larger than the sum of its proper divisors (1).

628682291 is an equidigital number, since it uses as much as digits as its factorization.

628682291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 165888, while the sum is 44.

The square root of 628682291 is about 25073.5376642388. The cubic root of 628682291 is about 856.6637875992.

The spelling of 628682291 in words is "six hundred twenty-eight million, six hundred eighty-two thousand, two hundred ninety-one".