691004 has 6 divisors (see below), whose sum is σ = 1209264. Its totient is φ = 345500.

The previous prime is 691001. The next prime is 691037. The reversal of 691004 is 400196.

691004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (691001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86372 + ... + 86379.

It is an arithmetic number, because the mean of its divisors is an integer number (201544).

2⁶⁹¹⁰⁰⁴ is an apocalyptic number.

It is an amenable number.

691004 is a deficient number, since it is larger than the sum of its proper divisors (518260).

691004 is a wasteful number, since it uses less digits than its factorization.

691004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172755 (or 172753 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 691004 is about 831.2665035956. The cubic root of 691004 is about 88.4083978836.

The spelling of 691004 in words is "six hundred ninety-one thousand, four".