688416251 has 8 divisors (see below), whose sum is σ = 693675360. Its totient is φ = 683171008.

The previous prime is 688416233. The next prime is 688416271. The reversal of 688416251 is 152614886.

688416251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-688416251 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 688416199 and 688416208.

It is not an unprimeable number, because it can be changed into a prime (688416221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110015 + ... + 116103.

It is an arithmetic number, because the mean of its divisors is an integer number (86709420).

Almost surely, 2^688416251 is an apocalyptic number.

688416251 is a deficient number, since it is larger than the sum of its proper divisors (5259109).

688416251 is a wasteful number, since it uses less digits than its factorization.

688416251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6933.

The product of its digits is 92160, while the sum is 41.

The square root of 688416251 is about 26237.6876077142. The cubic root of 688416251 is about 882.9789928339.

The spelling of 688416251 in words is "six hundred eighty-eight million, four hundred sixteen thousand, two hundred fifty-one".