691323196 has 6 divisors (see below), whose sum is σ = 1209815600. Its totient is φ = 345661596.

The previous prime is 691323179. The next prime is 691323211.

691323196 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×691323196² = 955855522655308832, which contains 22 as substring.

It is a congruent number.

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, 86415396 + ... + 86415403.

Almost surely, 2^691323196 is an apocalyptic number.

It is an amenable number.

691323196 is a deficient number, since it is larger than the sum of its proper divisors (518492404).

691323196 is a wasteful number, since it uses less digits than its factorization.

691323196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172830803 (or 172830801 counting only the distinct ones).

The product of its digits is 52488, while the sum is 40.

The square root of 691323196 is about 26293.0256151703. The cubic root of 691323196 is about 884.2200864078.

The spelling of 691323196 in words is "six hundred ninety-one million, three hundred twenty-three thousand, one hundred ninety-six".