627989 has 4 divisors (see below), whose sum is σ = 629760. Its totient is φ = 626220.

The previous prime is 627973. The next prime is 628013. The reversal of 627989 is 989726.

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 627989 - 2⁴ = 627973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (627919) 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, 149 + ... + 1130.

It is an arithmetic number, because the mean of its divisors is an integer number (157440).

2⁶²⁷⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

627989 is a deficient number, since it is larger than the sum of its proper divisors (1771).

627989 is a wasteful number, since it uses less digits than its factorization.

627989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1770.

The product of its digits is 54432, while the sum is 41.

The square root of 627989 is about 792.4575698421. The cubic root of 627989 is about 85.6348771173.

The spelling of 627989 in words is "six hundred twenty-seven thousand, nine hundred eighty-nine".