628687 has 2 divisors, whose sum is σ = 628688. Its totient is φ = 628686.

The previous prime is 628681. The next prime is 628699. The reversal of 628687 is 786826.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 628687 - 2³ = 628679 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314343 + 314344.

It is an arithmetic number, because the mean of its divisors is an integer number (314344).

2⁶²⁸⁶⁸⁷ is an apocalyptic number.

628687 is a deficient number, since it is larger than the sum of its proper divisors (1).

628687 is an equidigital number, since it uses as much as digits as its factorization.

628687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 37.

The square root of 628687 is about 792.8978496629. The cubic root of 628687 is about 85.6665926475. Note that the first 3 decimals are identical.

The spelling of 628687 in words is "six hundred twenty-eight thousand, six hundred eighty-seven".