688000427 has 2 divisors, whose sum is σ = 688000428. Its totient is φ = 688000426.

The previous prime is 688000337. The next prime is 688000433. The reversal of 688000427 is 724000886.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 688000427 - 2¹⁸ = 687738283 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (688000487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344000213 + 344000214.

It is an arithmetic number, because the mean of its divisors is an integer number (344000214).

Almost surely, 2^688000427 is an apocalyptic number.

688000427 is a deficient number, since it is larger than the sum of its proper divisors (1).

688000427 is an equidigital number, since it uses as much as digits as its factorization.

688000427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 688000427 is about 26229.7622368179. The cubic root of 688000427 is about 882.8011751221.

The spelling of 688000427 in words is "six hundred eighty-eight million, four hundred twenty-seven", and thus it is an aban number.