691341628 has 6 divisors (see below), whose sum is σ = 1209847856. Its totient is φ = 345670812.

The previous prime is 691341617. The next prime is 691341647. The reversal of 691341628 is 826143196.

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 as a sum of consecutive naturals, namely, 86417700 + ... + 86417707.

Almost surely, 2^691341628 is an apocalyptic number.

It is an amenable number.

691341628 is a deficient number, since it is larger than the sum of its proper divisors (518506228).

691341628 is a wasteful number, since it uses less digits than its factorization.

691341628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172835411 (or 172835409 counting only the distinct ones).

The product of its digits is 62208, while the sum is 40.

The square root of 691341628 is about 26293.3761240355. The cubic root of 691341628 is about 884.2279446714.

The spelling of 691341628 in words is "six hundred ninety-one million, three hundred forty-one thousand, six hundred twenty-eight".