139865129 has 2 divisors, whose sum is σ = 139865130. Its totient is φ = 139865128.

The previous prime is 139865123. The next prime is 139865147. The reversal of 139865129 is 921568931.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138109504 + 1755625 = 11752^2 + 1325^2 .

It is a cyclic number.

It is not a de Polignac number, because 139865129 - 2⁸ = 139864873 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 139865129.

It is not a weakly prime, because it can be changed into another prime (139865123) 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, 69932564 + 69932565.

It is an arithmetic number, because the mean of its divisors is an integer number (69932565).

Almost surely, 2^139865129 is an apocalyptic number.

It is an amenable number.

139865129 is a deficient number, since it is larger than the sum of its proper divisors (1).

139865129 is an equidigital number, since it uses as much as digits as its factorization.

139865129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 44.

The square root of 139865129 is about 11826.4588529280. The cubic root of 139865129 is about 519.0826144996.

The spelling of 139865129 in words is "one hundred thirty-nine million, eight hundred sixty-five thousand, one hundred twenty-nine".