139138314197 has 2 divisors, whose sum is σ = 139138314198. Its totient is φ = 139138314196.

The previous prime is 139138314191. The next prime is 139138314233. The reversal of 139138314197 is 791413831931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106058343556 + 33079970641 = 325666^2 + 181879^2 .

It is an emirp because it is prime and its reverse (791413831931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139138314197 - 2⁴ = 139138314181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139138314191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69569157098 + 69569157099.

It is an arithmetic number, because the mean of its divisors is an integer number (69569157099).

Almost surely, 2^139138314197 is an apocalyptic number.

It is an amenable number.

139138314197 is a deficient number, since it is larger than the sum of its proper divisors (1).

139138314197 is an equidigital number, since it uses as much as digits as its factorization.

139138314197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 50.

The spelling of 139138314197 in words is "one hundred thirty-nine billion, one hundred thirty-eight million, three hundred fourteen thousand, one hundred ninety-seven".