689420903 has 2 divisors, whose sum is σ = 689420904. Its totient is φ = 689420902.

The previous prime is 689420899. The next prime is 689420911. The reversal of 689420903 is 309024986.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 689420903 - 2² = 689420899 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (689420983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344710451 + 344710452.

It is an arithmetic number, because the mean of its divisors is an integer number (344710452).

Almost surely, 2^689420903 is an apocalyptic number.

689420903 is a deficient number, since it is larger than the sum of its proper divisors (1).

689420903 is an equidigital number, since it uses as much as digits as its factorization.

689420903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 689420903 is about 26256.8258363421. The cubic root of 689420903 is about 883.4083142079.

The spelling of 689420903 in words is "six hundred eighty-nine million, four hundred twenty thousand, nine hundred three".