688939343 has 2 divisors, whose sum is σ = 688939344. Its totient is φ = 688939342.

The previous prime is 688939337. The next prime is 688939351. The reversal of 688939343 is 343939886.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 688939343 - 2²⁰ = 687890767 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (688939243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344469671 + 344469672.

It is an arithmetic number, because the mean of its divisors is an integer number (344469672).

Almost surely, 2^688939343 is an apocalyptic number.

688939343 is a deficient number, since it is larger than the sum of its proper divisors (1).

688939343 is an equidigital number, since it uses as much as digits as its factorization.

688939343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3359232, while the sum is 53.

The square root of 688939343 is about 26247.6540475525. The cubic root of 688939343 is about 883.2025796100.

The spelling of 688939343 in words is "six hundred eighty-eight million, nine hundred thirty-nine thousand, three hundred forty-three".