688097445 has 64 divisors (see below), whose sum is σ = 1351680000. Its totient is φ = 297960768.

The previous prime is 688097441. The next prime is 688097447. The reversal of 688097445 is 544790886.

It is not a de Polignac number, because 688097445 - 2² = 688097441 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688097441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 94236 + ... + 101274.

It is an arithmetic number, because the mean of its divisors is an integer number (21120000).

Almost surely, 2^688097445 is an apocalyptic number.

It is an amenable number.

688097445 is a deficient number, since it is larger than the sum of its proper divisors (663582555).

688097445 is a wasteful number, since it uses less digits than its factorization.

688097445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7087 (or 7073 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 51.

The square root of 688097445 is about 26231.6115593381. The cubic root of 688097445 is about 882.8426690784.

The spelling of 688097445 in words is "six hundred eighty-eight million, ninety-seven thousand, four hundred forty-five".