628969 has 4 divisors (see below), whose sum is σ = 686160. Its totient is φ = 571780.

The previous prime is 628939. The next prime is 628973. The reversal of 628969 is 969826.

It is a happy number.

628969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 628969 - 2⁵ = 628937 is a prime.

It is a super-2 number, since 2×628969² = 791204005922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628909) 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, 28579 + ... + 28600.

It is an arithmetic number, because the mean of its divisors is an integer number (171540).

2⁶²⁸⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

628969 is a deficient number, since it is larger than the sum of its proper divisors (57191).

628969 is a wasteful number, since it uses less digits than its factorization.

628969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57190.

The product of its digits is 46656, while the sum is 40.

The square root of 628969 is about 793.0756584337. The cubic root of 628969 is about 85.6793994273.

The spelling of 628969 in words is "six hundred twenty-eight thousand, nine hundred sixty-nine".