688552043 has 2 divisors, whose sum is σ = 688552044. Its totient is φ = 688552042.

The previous prime is 688551953. The next prime is 688552091. The reversal of 688552043 is 340255886.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 688552043 - 2¹² = 688547947 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (688552643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344276021 + 344276022.

It is an arithmetic number, because the mean of its divisors is an integer number (344276022).

Almost surely, 2^688552043 is an apocalyptic number.

688552043 is a deficient number, since it is larger than the sum of its proper divisors (1).

688552043 is an equidigital number, since it uses as much as digits as its factorization.

688552043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 230400, while the sum is 41.

The square root of 688552043 is about 26240.2752081605. The cubic root of 688552043 is about 883.0370456958.

The spelling of 688552043 in words is "six hundred eighty-eight million, five hundred fifty-two thousand, forty-three".