691444196 has 12 divisors (see below), whose sum is σ = 1281205548. Its totient is φ = 325385472.

The previous prime is 691444163. The next prime is 691444217.

691444196 is nontrivially palindromic in base 10.

691444196 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 438316096 + 253128100 = 20936^2 + 15910^2 .

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5084081 + ... + 5084216.

It is an arithmetic number, because the mean of its divisors is an integer number (106767129).

Almost surely, 2^691444196 is an apocalyptic number.

It is an amenable number.

691444196 is a deficient number, since it is larger than the sum of its proper divisors (589761352).

691444196 is a wasteful number, since it uses less digits than its factorization.

691444196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10168318 (or 10168316 counting only the distinct ones).

The product of its digits is 186624, while the sum is 44.

The square root of 691444196 is about 26295.3265049134. The cubic root of 691444196 is about 884.2716707655.

The spelling of 691444196 in words is "six hundred ninety-one million, four hundred forty-four thousand, one hundred ninety-six".