691941084 has 12 divisors (see below), whose sum is σ = 1614529224. Its totient is φ = 230647024.

The previous prime is 691941059. The next prime is 691941113. The reversal of 691941084 is 480149196.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28830867 + ... + 28830890.

It is an arithmetic number, because the mean of its divisors is an integer number (134544102).

Almost surely, 2^691941084 is an apocalyptic number.

It is an amenable number.

691941084 is an abundant number, since it is smaller than the sum of its proper divisors (922588140).

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

691941084 is a wasteful number, since it uses less digits than its factorization.

691941084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57661764 (or 57661762 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 691941084 is about 26304.7730269622. The cubic root of 691941084 is about 884.4834394934.

The spelling of 691941084 in words is "six hundred ninety-one million, nine hundred forty-one thousand, eighty-four".