688352231 has 16 divisors (see below), whose sum is σ = 793228800. Its totient is φ = 585131040.

The previous prime is 688352209. The next prime is 688352251. The reversal of 688352231 is 132253886.

It is a cyclic number.

It is not a de Polignac number, because 688352231 - 2⁶ = 688352167 is a prime.

It is a super-2 number, since 2×688352231² = 947657587845354722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688352251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 758480 + ... + 759386.

It is an arithmetic number, because the mean of its divisors is an integer number (49576800).

Almost surely, 2^688352231 is an apocalyptic number.

688352231 is a deficient number, since it is larger than the sum of its proper divisors (104876569).

688352231 is a wasteful number, since it uses less digits than its factorization.

688352231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1694.

The product of its digits is 69120, while the sum is 38.

The square root of 688352231 is about 26236.4675785442. The cubic root of 688352231 is about 882.9516207958.

The spelling of 688352231 in words is "six hundred eighty-eight million, three hundred fifty-two thousand, two hundred thirty-one".