688271371 has 4 divisors (see below), whose sum is σ = 724496200. Its totient is φ = 652046544.

The previous prime is 688271359. The next prime is 688271449. The reversal of 688271371 is 173172886.

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 688271371 - 2⁹ = 688270859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (688271321) 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, 18112386 + ... + 18112423.

It is an arithmetic number, because the mean of its divisors is an integer number (181124050).

Almost surely, 2^688271371 is an apocalyptic number.

688271371 is a deficient number, since it is larger than the sum of its proper divisors (36224829).

688271371 is a wasteful number, since it uses less digits than its factorization.

688271371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36224828.

The product of its digits is 112896, while the sum is 43.

The square root of 688271371 is about 26234.9265484011. The cubic root of 688271371 is about 882.9170463146.

The spelling of 688271371 in words is "six hundred eighty-eight million, two hundred seventy-one thousand, three hundred seventy-one".