139207349 has 2 divisors, whose sum is σ = 139207350. Its totient is φ = 139207348.

The previous prime is 139207331. The next prime is 139207381. The reversal of 139207349 is 943702931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84180625 + 55026724 = 9175^2 + 7418^2 .

It is an emirp because it is prime and its reverse (943702931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139207349 - 2⁸ = 139207093 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139207399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69603674 + 69603675.

It is an arithmetic number, because the mean of its divisors is an integer number (69603675).

Almost surely, 2^139207349 is an apocalyptic number.

It is an amenable number.

139207349 is a deficient number, since it is larger than the sum of its proper divisors (1).

139207349 is an equidigital number, since it uses as much as digits as its factorization.

139207349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 139207349 is about 11798.6164019346. The cubic root of 139207349 is about 518.2675940334.

The spelling of 139207349 in words is "one hundred thirty-nine million, two hundred seven thousand, three hundred forty-nine".