689907 has 16 divisors (see below), whose sum is σ = 967680. Its totient is φ = 436800.

The previous prime is 689903. The next prime is 689917. The reversal of 689907 is 709986.

It is not a de Polignac number, because 689907 - 2² = 689903 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (689903) 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 15 ways as a sum of consecutive naturals, for example, 8694 + ... + 8772.

It is an arithmetic number, because the mean of its divisors is an integer number (60480).

2⁶⁸⁹⁹⁰⁷ is an apocalyptic number.

689907 is a deficient number, since it is larger than the sum of its proper divisors (277773).

689907 is a wasteful number, since it uses less digits than its factorization.

689907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 689907 is about 830.6064049837. The cubic root of 689907 is about 88.3615889988.

It can be divided in two parts, 689 and 907, that added together give a triangular number (1596 = T₅₆).

The spelling of 689907 in words is "six hundred eighty-nine thousand, nine hundred seven".