628423 has 2 divisors, whose sum is σ = 628424. Its totient is φ = 628422.

The previous prime is 628399. The next prime is 628427. The reversal of 628423 is 324826.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 628423 - 2⁵ = 628391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314211 + 314212.

It is an arithmetic number, because the mean of its divisors is an integer number (314212).

2⁶²⁸⁴²³ is an apocalyptic number.

628423 is a deficient number, since it is larger than the sum of its proper divisors (1).

628423 is an equidigital number, since it uses as much as digits as its factorization.

628423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 25.

The square root of 628423 is about 792.7313542430. The cubic root of 628423 is about 85.6545998504.

The spelling of 628423 in words is "six hundred twenty-eight thousand, four hundred twenty-three".