691136 has 14 divisors (see below), whose sum is σ = 1371600. Its totient is φ = 345536.

The previous prime is 691129. The next prime is 691147. The reversal of 691136 is 631196.

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 691136.

It is an unprimeable number.

691136 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5336 + ... + 5463.

2⁶⁹¹¹³⁶ is an apocalyptic number.

It is an amenable number.

691136 is a deficient number, since it is larger than the sum of its proper divisors (680464).

691136 is a wasteful number, since it uses less digits than its factorization.

691136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10811 (or 10801 counting only the distinct ones).

The product of its digits is 972, while the sum is 26.

The square root of 691136 is about 831.3458967241. The cubic root of 691136 is about 88.4140269709.

The spelling of 691136 in words is "six hundred ninety-one thousand, one hundred thirty-six".