688733743 has 2 divisors, whose sum is σ = 688733744. Its totient is φ = 688733742.

The previous prime is 688733719. The next prime is 688733753. The reversal of 688733743 is 347337886.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 688733743 - 2¹³ = 688725551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (688733713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344366871 + 344366872.

It is an arithmetic number, because the mean of its divisors is an integer number (344366872).

Almost surely, 2^688733743 is an apocalyptic number.

688733743 is a deficient number, since it is larger than the sum of its proper divisors (1).

688733743 is an equidigital number, since it uses as much as digits as its factorization.

688733743 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2032128, while the sum is 49.

The square root of 688733743 is about 26243.7372148099. The cubic root of 688733743 is about 883.1147128920.

The spelling of 688733743 in words is "six hundred eighty-eight million, seven hundred thirty-three thousand, seven hundred forty-three".