688427351 has 4 divisors (see below), whose sum is σ = 705218304. Its totient is φ = 671636400.

The previous prime is 688427347. The next prime is 688427381. The reversal of 688427351 is 153724886.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 688427351 - 2² = 688427347 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688427321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8395415 + ... + 8395496.

It is an arithmetic number, because the mean of its divisors is an integer number (176304576).

Almost surely, 2^688427351 is an apocalyptic number.

688427351 is a deficient number, since it is larger than the sum of its proper divisors (16790953).

688427351 is a wasteful number, since it uses less digits than its factorization.

688427351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16790952.

The product of its digits is 322560, while the sum is 44.

The square root of 688427351 is about 26237.8991346487. The cubic root of 688427351 is about 882.9837385160.

The spelling of 688427351 in words is "six hundred eighty-eight million, four hundred twenty-seven thousand, three hundred fifty-one".