195420580139 has 2 divisors, whose sum is σ = 195420580140. Its totient is φ = 195420580138.

The previous prime is 195420580073. The next prime is 195420580163. The reversal of 195420580139 is 931085024591.

It is a strong prime.

It is an emirp because it is prime and its reverse (931085024591) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195420580139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 195420580093 and 195420580102.

It is not a weakly prime, because it can be changed into another prime (195420580169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97710290069 + 97710290070.

It is an arithmetic number, because the mean of its divisors is an integer number (97710290070).

Almost surely, 2^195420580139 is an apocalyptic number.

195420580139 is a deficient number, since it is larger than the sum of its proper divisors (1).

195420580139 is an equidigital number, since it uses as much as digits as its factorization.

195420580139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 388800, while the sum is 47.

The spelling of 195420580139 in words is "one hundred ninety-five billion, four hundred twenty million, five hundred eighty thousand, one hundred thirty-nine".