691133488 has 10 divisors (see below), whose sum is σ = 1339071164. Its totient is φ = 345566736.

The previous prime is 691133479. The next prime is 691133491. The reversal of 691133488 is 884331196.

It is a super-2 number, since 2×691133488² = 955330996470092288, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21597906 + ... + 21597937.

Almost surely, 2^691133488 is an apocalyptic number.

It is an amenable number.

691133488 is a deficient number, since it is larger than the sum of its proper divisors (647937676).

691133488 is a wasteful number, since it uses less digits than its factorization.

691133488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43195851 (or 43195845 counting only the distinct ones).

The product of its digits is 124416, while the sum is 43.

The square root of 691133488 is about 26289.4177949988. The cubic root of 691133488 is about 884.1391985437.

The spelling of 691133488 in words is "six hundred ninety-one million, one hundred thirty-three thousand, four hundred eighty-eight".