139542349 has 2 divisors, whose sum is σ = 139542350. Its totient is φ = 139542348.

The previous prime is 139542343. The next prime is 139542371. The reversal of 139542349 is 943245931.

139542349 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118657449 + 20884900 = 10893^2 + 4570^2 .

It is a cyclic number.

It is not a de Polignac number, because 139542349 - 2⁵ = 139542317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139542343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69771174 + 69771175.

It is an arithmetic number, because the mean of its divisors is an integer number (69771175).

Almost surely, 2^139542349 is an apocalyptic number.

It is an amenable number.

139542349 is a deficient number, since it is larger than the sum of its proper divisors (1).

139542349 is an equidigital number, since it uses as much as digits as its factorization.

139542349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 40.

The square root of 139542349 is about 11812.8044511030. The cubic root of 139542349 is about 518.6829948971.

The spelling of 139542349 in words is "one hundred thirty-nine million, five hundred forty-two thousand, three hundred forty-nine".