628168193 has 4 divisors (see below), whose sum is σ = 628486320. Its totient is φ = 627850068.

The previous prime is 628168183. The next prime is 628168213. The reversal of 628168193 is 391861826.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 628168193 - 2²⁴ = 611390977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (628168133) 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 in 3 ways as a sum of consecutive naturals, for example, 156083 + ... + 160056.

It is an arithmetic number, because the mean of its divisors is an integer number (157121580).

Almost surely, 2^628168193 is an apocalyptic number.

It is an amenable number.

628168193 is a deficient number, since it is larger than the sum of its proper divisors (318127).

628168193 is a wasteful number, since it uses less digits than its factorization.

628168193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318126.

The product of its digits is 124416, while the sum is 44.

The square root of 628168193 is about 25063.2837633060. The cubic root of 628168193 is about 856.4302148035.

The spelling of 628168193 in words is "six hundred twenty-eight million, one hundred sixty-eight thousand, one hundred ninety-three".