139849134921191 has 2 divisors, whose sum is σ = 139849134921192. Its totient is φ = 139849134921190.

The previous prime is 139849134921187. The next prime is 139849134921239. The reversal of 139849134921191 is 191129431948931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 139849134921191 - 2² = 139849134921187 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139849134921121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69924567460595 + 69924567460596.

It is an arithmetic number, because the mean of its divisors is an integer number (69924567460596).

Almost surely, 2^{139849134921191} is an apocalyptic number.

139849134921191 is a deficient number, since it is larger than the sum of its proper divisors (1).

139849134921191 is an equidigital number, since it uses as much as digits as its factorization.

139849134921191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15116544, while the sum is 65.

The spelling of 139849134921191 in words is "one hundred thirty-nine trillion, eight hundred forty-nine billion, one hundred thirty-four million, nine hundred twenty-one thousand, one hundred ninety-one".