678328486123 has 2 divisors, whose sum is σ = 678328486124. Its totient is φ = 678328486122.

The previous prime is 678328486097. The next prime is 678328486153. The reversal of 678328486123 is 321684823876.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-678328486123 is a prime.

It is a super-2 number, since 2×678328486123² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (678328486153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339164243061 + 339164243062.

It is an arithmetic number, because the mean of its divisors is an integer number (339164243062).

Almost surely, 2^678328486123 is an apocalyptic number.

678328486123 is a deficient number, since it is larger than the sum of its proper divisors (1).

678328486123 is an equidigital number, since it uses as much as digits as its factorization.

678328486123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18579456, while the sum is 58.

The spelling of 678328486123 in words is "six hundred seventy-eight billion, three hundred twenty-eight million, four hundred eighty-six thousand, one hundred twenty-three".