688453 has 2 divisors, whose sum is σ = 688454. Its totient is φ = 688452.

The previous prime is 688451. The next prime is 688477. The reversal of 688453 is 354886.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 675684 + 12769 = 822^2 + 113^2 .

It is a cyclic number.

It is not a de Polignac number, because 688453 - 2¹ = 688451 is a prime.

Together with 688451, it forms a pair of twin primes.

688453 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (688451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344226 + 344227.

It is an arithmetic number, because the mean of its divisors is an integer number (344227).

2⁶⁸⁸⁴⁵³ is an apocalyptic number.

It is an amenable number.

688453 is a deficient number, since it is larger than the sum of its proper divisors (1).

688453 is an equidigital number, since it uses as much as digits as its factorization.

688453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23040, while the sum is 34.

The square root of 688453 is about 829.7306791966. The cubic root of 688453 is about 88.2994704267.

The spelling of 688453 in words is "six hundred eighty-eight thousand, four hundred fifty-three".