689627 has 4 divisors (see below), whose sum is σ = 691296. Its totient is φ = 687960.

The previous prime is 689621. The next prime is 689629. The reversal of 689627 is 726986.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-689627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (689621) 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, 302 + ... + 1212.

It is an arithmetic number, because the mean of its divisors is an integer number (172824).

2⁶⁸⁹⁶²⁷ is an apocalyptic number.

689627 is a deficient number, since it is larger than the sum of its proper divisors (1669).

689627 is an equidigital number, since it uses as much as digits as its factorization.

689627 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1668.

The product of its digits is 36288, while the sum is 38.

The square root of 689627 is about 830.4378363249. The cubic root of 689627 is about 88.3496334778.

The spelling of 689627 in words is "six hundred eighty-nine thousand, six hundred twenty-seven".