691112 has 8 divisors (see below), whose sum is σ = 1295850. Its totient is φ = 345552.

The previous prime is 691111. The next prime is 691121. The reversal of 691112 is 211196.

It can be written as a sum of positive squares in only one way, i.e., 682276 + 8836 = 826^2 + 94^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (691111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43187 + ... + 43202.

2⁶⁹¹¹¹² is an apocalyptic number.

It is an amenable number.

691112 is a deficient number, since it is larger than the sum of its proper divisors (604738).

691112 is a wasteful number, since it uses less digits than its factorization.

691112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86395 (or 86391 counting only the distinct ones).

The product of its digits is 108, while the sum is 20.

The square root of 691112 is about 831.3314621738. The cubic root of 691112 is about 88.4130035538.

The spelling of 691112 in words is "six hundred ninety-one thousand, one hundred twelve".