688229375 has 20 divisors (see below), whose sum is σ = 861736656. Its totient is φ = 549480000.

The previous prime is 688229369. The next prime is 688229401. The reversal of 688229375 is 573922886.

It is not a de Polignac number, because 688229375 - 2⁴ = 688229359 is a prime.

It is a super-2 number, since 2×688229375² = 947319345225781250, which contains 22 as substring.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 474902 + ... + 476348.

Almost surely, 2^688229375 is an apocalyptic number.

688229375 is a deficient number, since it is larger than the sum of its proper divisors (173507281).

688229375 is an equidigital number, since it uses as much as digits as its factorization.

688229375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2228 (or 2213 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 50.

The square root of 688229375 is about 26234.1261527805. The cubic root of 688229375 is about 882.8990884083.

The spelling of 688229375 in words is "six hundred eighty-eight million, two hundred twenty-nine thousand, three hundred seventy-five".