628694593 has 4 divisors (see below), whose sum is σ = 634798528. Its totient is φ = 622590660.

The previous prime is 628694587. The next prime is 628694611. The reversal of 628694593 is 395496826.

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 a de Polignac number, because none of the positive numbers 2^k-628694593 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 628694593.

It is not an unprimeable number, because it can be changed into a prime (628694093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3051813 + ... + 3052018.

It is an arithmetic number, because the mean of its divisors is an integer number (158699632).

Almost surely, 2^628694593 is an apocalyptic number.

It is an amenable number.

628694593 is a deficient number, since it is larger than the sum of its proper divisors (6103935).

628694593 is a wasteful number, since it uses less digits than its factorization.

628694593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6103934.

The product of its digits is 2799360, while the sum is 52.

The square root of 628694593 is about 25073.7829814330. The cubic root of 628694593 is about 856.6693752701.

The spelling of 628694593 in words is "six hundred twenty-eight million, six hundred ninety-four thousand, five hundred ninety-three".