688275233 has 2 divisors, whose sum is σ = 688275234. Its totient is φ = 688275232.

The previous prime is 688275229. The next prime is 688275257. The reversal of 688275233 is 332572886.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 516743824 + 171531409 = 22732^2 + 13097^2 .

It is a cyclic number.

It is not a de Polignac number, because 688275233 - 2² = 688275229 is a prime.

It is a super-2 number, since 2×688275233² = 947445592722408578, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (688275293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344137616 + 344137617.

It is an arithmetic number, because the mean of its divisors is an integer number (344137617).

Almost surely, 2^688275233 is an apocalyptic number.

It is an amenable number.

688275233 is a deficient number, since it is larger than the sum of its proper divisors (1).

688275233 is an equidigital number, since it uses as much as digits as its factorization.

688275233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 44.

The square root of 688275233 is about 26235.0001524681. Note that the first 3 decimals coincide. The cubic root of 688275233 is about 882.9186977075.

The spelling of 688275233 in words is "six hundred eighty-eight million, two hundred seventy-five thousand, two hundred thirty-three".