691828916 has 12 divisors (see below), whose sum is σ = 1240230180. Its totient is φ = 337477440.

The previous prime is 691828913. The next prime is 691828919. The reversal of 691828916 is 619828196.

It is a happy number.

691828916 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (691828913) and next prime (691828919).

It can be written as a sum of positive squares in 2 ways, for example, as 336355600 + 355473316 = 18340^2 + 18854^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (691828913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2109071 + ... + 2109398.

It is an arithmetic number, because the mean of its divisors is an integer number (103352515).

Almost surely, 2^691828916 is an apocalyptic number.

It is an amenable number.

691828916 is a deficient number, since it is larger than the sum of its proper divisors (548401264).

691828916 is a wasteful number, since it uses less digits than its factorization.

691828916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4218514 (or 4218512 counting only the distinct ones).

The product of its digits is 373248, while the sum is 50.

The square root of 691828916 is about 26302.6408560053. The cubic root of 691828916 is about 884.4356434685.

The spelling of 691828916 in words is "six hundred ninety-one million, eight hundred twenty-eight thousand, nine hundred sixteen".