39996500123 has 2 divisors, whose sum is σ = 39996500124. Its totient is φ = 39996500122.

The previous prime is 39996500059. The next prime is 39996500129. The reversal of 39996500123 is 32100569993.

It is a strong prime.

It is an emirp because it is prime and its reverse (32100569993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39996500123 - 2⁶ = 39996500059 is a prime.

It is not a weakly prime, because it can be changed into another prime (39996500129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19998250061 + 19998250062.

It is an arithmetic number, because the mean of its divisors is an integer number (19998250062).

Almost surely, 2^39996500123 is an apocalyptic number.

39996500123 is a deficient number, since it is larger than the sum of its proper divisors (1).

39996500123 is an equidigital number, since it uses as much as digits as its factorization.

39996500123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 393660, while the sum is 47.

The spelling of 39996500123 in words is "thirty-nine billion, nine hundred ninety-six million, five hundred thousand, one hundred twenty-three".