691486231 has 8 divisors (see below), whose sum is σ = 707814144. Its totient is φ = 675225720.

The previous prime is 691486193. The next prime is 691486241. The reversal of 691486231 is 132684196.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 691486231 - 2⁹ = 691485719 is a prime.

It is a super-2 number, since 2×691486231² = 956306415325170722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (691486241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4216 + ... + 37426.

It is an arithmetic number, because the mean of its divisors is an integer number (88476768).

Almost surely, 2^691486231 is an apocalyptic number.

691486231 is a deficient number, since it is larger than the sum of its proper divisors (16327913).

691486231 is a wasteful number, since it uses less digits than its factorization.

691486231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33701.

The product of its digits is 62208, while the sum is 40.

The square root of 691486231 is about 26296.1257792854. The cubic root of 691486231 is about 884.2895895923.

The spelling of 691486231 in words is "six hundred ninety-one million, four hundred eighty-six thousand, two hundred thirty-one".