689693743 has 2 divisors, whose sum is σ = 689693744. Its totient is φ = 689693742.

The previous prime is 689693699. The next prime is 689693827. The reversal of 689693743 is 347396986.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-689693743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (689693143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344846871 + 344846872.

It is an arithmetic number, because the mean of its divisors is an integer number (344846872).

Almost surely, 2^689693743 is an apocalyptic number.

689693743 is a deficient number, since it is larger than the sum of its proper divisors (1).

689693743 is an equidigital number, since it uses as much as digits as its factorization.

689693743 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5878656, while the sum is 55.

The square root of 689693743 is about 26262.0209237598. The cubic root of 689693743 is about 883.5248358347.

The spelling of 689693743 in words is "six hundred eighty-nine million, six hundred ninety-three thousand, seven hundred forty-three".