691929324 has 72 divisors (see below), whose sum is σ = 1819464080. Its totient is φ = 227377152.

The previous prime is 691929311. The next prime is 691929349. The reversal of 691929324 is 423929196.

It is a happy number.

It is a super-2 number, since 2×691929324² = 957532378822193952, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 691929324.

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, 2692204 + ... + 2692460.

Almost surely, 2^691929324 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 691929324, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (909732040).

691929324 is an abundant number, since it is smaller than the sum of its proper divisors (1127534756).

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

691929324 is a wasteful number, since it uses less digits than its factorization.

691929324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624 (or 359 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 691929324 is about 26304.5494924357. The cubic root of 691929324 is about 884.4784286697.

The spelling of 691929324 in words is "six hundred ninety-one million, nine hundred twenty-nine thousand, three hundred twenty-four".