688225271 has 4 divisors (see below), whose sum is σ = 706825992. Its totient is φ = 669624552.

The previous prime is 688225267. The next prime is 688225289. The reversal of 688225271 is 172522886.

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 688225271 - 2² = 688225267 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 (688225231) 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, 9300305 + ... + 9300378.

It is an arithmetic number, because the mean of its divisors is an integer number (176706498).

Almost surely, 2^688225271 is an apocalyptic number.

688225271 is a deficient number, since it is larger than the sum of its proper divisors (18600721).

688225271 is a wasteful number, since it uses less digits than its factorization.

688225271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18600720.

The product of its digits is 107520, while the sum is 41.

The square root of 688225271 is about 26234.0479339350. The cubic root of 688225271 is about 882.8973334580.

The spelling of 688225271 in words is "six hundred eighty-eight million, two hundred twenty-five thousand, two hundred seventy-one".