139126213 has 2 divisors, whose sum is σ = 139126214. Its totient is φ = 139126212.

The previous prime is 139126159. The next prime is 139126231. The reversal of 139126213 is 312621931.

Together with next prime (139126231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127983969 + 11142244 = 11313^2 + 3338^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139126213 is a prime.

It is a super-2 number, since 2×139126213² = 38712206287442738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139126513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69563106 + 69563107.

It is an arithmetic number, because the mean of its divisors is an integer number (69563107).

Almost surely, 2^139126213 is an apocalyptic number.

It is an amenable number.

139126213 is a deficient number, since it is larger than the sum of its proper divisors (1).

139126213 is an equidigital number, since it uses as much as digits as its factorization.

139126213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 28.

The square root of 139126213 is about 11795.1775315169. The cubic root of 139126213 is about 518.1668849544.

The spelling of 139126213 in words is "one hundred thirty-nine million, one hundred twenty-six thousand, two hundred thirteen".