654340123 has 2 divisors, whose sum is σ = 654340124. Its totient is φ = 654340122.

The previous prime is 654340117. The next prime is 654340129. The reversal of 654340123 is 321043456.

It is a balanced prime because it is at equal distance from previous prime (654340117) and next prime (654340129).

It is a cyclic number.

It is not a de Polignac number, because 654340123 - 2⁵ = 654340091 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 654340091 and 654340100.

It is not a weakly prime, because it can be changed into another prime (654340129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327170061 + 327170062.

It is an arithmetic number, because the mean of its divisors is an integer number (327170062).

Almost surely, 2^654340123 is an apocalyptic number.

654340123 is a deficient number, since it is larger than the sum of its proper divisors (1).

654340123 is an equidigital number, since it uses as much as digits as its factorization.

654340123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 654340123 is about 25580.0727715931. The cubic root of 654340123 is about 868.1628219794.

Adding to 654340123 its reverse (321043456), we get a palindrome (975383579).

The spelling of 654340123 in words is "six hundred fifty-four million, three hundred forty thousand, one hundred twenty-three".