688384423 has 2 divisors, whose sum is σ = 688384424. Its totient is φ = 688384422.

The previous prime is 688384399. The next prime is 688384439. The reversal of 688384423 is 324483886.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 688384423 - 2⁵ = 688384391 is a prime.

It is a super-2 number, since 2×688384423² = 947746227658085858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (688384453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344192211 + 344192212.

It is an arithmetic number, because the mean of its divisors is an integer number (344192212).

Almost surely, 2^688384423 is an apocalyptic number.

688384423 is a deficient number, since it is larger than the sum of its proper divisors (1).

688384423 is an equidigital number, since it uses as much as digits as its factorization.

688384423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 884736, while the sum is 46.

The square root of 688384423 is about 26237.0810685945. The cubic root of 688384423 is about 882.9653848419.

The spelling of 688384423 in words is "six hundred eighty-eight million, three hundred eighty-four thousand, four hundred twenty-three".