689975 has 24 divisors (see below), whose sum is σ = 1010352. Its totient is φ = 460800.

The previous prime is 689963. The next prime is 689981. The reversal of 689975 is 579986.

It is not a de Polignac number, because 689975 - 2⁴ = 689959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 689975.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 3479 + ... + 3671.

It is an arithmetic number, because the mean of its divisors is an integer number (42098).

2⁶⁸⁹⁹⁷⁵ is an apocalyptic number.

689975 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

689975 is a deficient number, since it is larger than the sum of its proper divisors (320377).

689975 is a wasteful number, since it uses less digits than its factorization.

689975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227 (or 222 counting only the distinct ones).

The product of its digits is 136080, while the sum is 44.

The square root of 689975 is about 830.6473379239. The cubic root of 689975 is about 88.3644919942.

The spelling of 689975 in words is "six hundred eighty-nine thousand, nine hundred seventy-five".