691071696 has 120 divisors (see below), whose sum is σ = 2307560640. Its totient is φ = 197443008.

The previous prime is 691071683. The next prime is 691071707. The reversal of 691071696 is 696170196.

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 in 23 ways as a sum of consecutive naturals, for example, 4845 + ... + 37491.

It is an arithmetic number, because the mean of its divisors is an integer number (19229672).

Almost surely, 2^691071696 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 691071696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1153780320).

691071696 is an abundant number, since it is smaller than the sum of its proper divisors (1616488944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

691071696 is a wasteful number, since it uses less digits than its factorization.

691071696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32678 (or 32659 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 691071696 is about 26288.2425430077. The cubic root of 691071696 is about 884.1128484205.

It can be divided in two parts, 6910 and 71696, that added together give a triangular number (78606 = T₃₉₆).

The spelling of 691071696 in words is "six hundred ninety-one million, seventy-one thousand, six hundred ninety-six".