688418087 has 8 divisors (see below), whose sum is σ = 796723200. Its totient is φ = 582602904.

The previous prime is 688418063. The next prime is 688418117. The reversal of 688418087 is 780814886.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 688418087 - 2¹² = 688413991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688418047) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 621887 + ... + 622992.

It is an arithmetic number, because the mean of its divisors is an integer number (99590400).

Almost surely, 2^688418087 is an apocalyptic number.

688418087 is a deficient number, since it is larger than the sum of its proper divisors (108305113).

688418087 is a wasteful number, since it uses less digits than its factorization.

688418087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1244965.

The product of its (nonzero) digits is 688128, while the sum is 50.

The square root of 688418087 is about 26237.7225955303. The cubic root of 688418087 is about 882.9797777989.

The spelling of 688418087 in words is "six hundred eighty-eight million, four hundred eighteen thousand, eighty-seven".