39642246139 has 2 divisors, whose sum is σ = 39642246140. Its totient is φ = 39642246138.

The previous prime is 39642246103. The next prime is 39642246167. The reversal of 39642246139 is 93164224693.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 39642246139 - 2⁷ = 39642246011 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 39642246092 and 39642246101.

It is not a weakly prime, because it can be changed into another prime (39642246439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19821123069 + 19821123070.

It is an arithmetic number, because the mean of its divisors is an integer number (19821123070).

Almost surely, 2^39642246139 is an apocalyptic number.

39642246139 is a deficient number, since it is larger than the sum of its proper divisors (1).

39642246139 is an equidigital number, since it uses as much as digits as its factorization.

39642246139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1679616, while the sum is 49.

The spelling of 39642246139 in words is "thirty-nine billion, six hundred forty-two million, two hundred forty-six thousand, one hundred thirty-nine".