691232 has 12 divisors (see below), whose sum is σ = 1360926. Its totient is φ = 345600.

The previous prime is 691231. The next prime is 691241. The reversal of 691232 is 232196.

It can be written as a sum of positive squares in only one way, i.e., 456976 + 234256 = 676^2 + 484^2 .

It is a junction number, because it is equal to n+sod(n) for n = 691198 and 691207.

It is not an unprimeable number, because it can be changed into a prime (691231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10769 + ... + 10832.

2⁶⁹¹²³² is an apocalyptic number.

It is an amenable number.

691232 is a deficient number, since it is larger than the sum of its proper divisors (669694).

691232 is a wasteful number, since it uses less digits than its factorization.

691232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21611 (or 21603 counting only the distinct ones).

The product of its digits is 648, while the sum is 23.

The square root of 691232 is about 831.4036324193. The cubic root of 691232 is about 88.4181204024.

The spelling of 691232 in words is "six hundred ninety-one thousand, two hundred thirty-two".