688312343 has 2 divisors, whose sum is σ = 688312344. Its totient is φ = 688312342.

The previous prime is 688312333. The next prime is 688312357. The reversal of 688312343 is 343213886.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 688312343 - 2⁴ = 688312327 is a prime.

It is a super-2 number, since 2×688312343² = 947547763052299298, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 688312297 and 688312306.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (688312333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344156171 + 344156172.

It is an arithmetic number, because the mean of its divisors is an integer number (344156172).

Almost surely, 2^688312343 is an apocalyptic number.

688312343 is a deficient number, since it is larger than the sum of its proper divisors (1).

688312343 is an equidigital number, since it uses as much as digits as its factorization.

688312343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 38.

The square root of 688312343 is about 26235.7074042230. The cubic root of 688312343 is about 882.9345656444.

The spelling of 688312343 in words is "six hundred eighty-eight million, three hundred twelve thousand, three hundred forty-three".