139173029 has 2 divisors, whose sum is σ = 139173030. Its totient is φ = 139173028.

The previous prime is 139173017. The next prime is 139173049. The reversal of 139173029 is 920371931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73530625 + 65642404 = 8575^2 + 8102^2 .

It is an emirp because it is prime and its reverse (920371931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139173029 - 2⁸ = 139172773 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 139173029.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139173049) 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, 69586514 + 69586515.

It is an arithmetic number, because the mean of its divisors is an integer number (69586515).

Almost surely, 2^139173029 is an apocalyptic number.

It is an amenable number.

139173029 is a deficient number, since it is larger than the sum of its proper divisors (1).

139173029 is an equidigital number, since it uses as much as digits as its factorization.

139173029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10206, while the sum is 35.

The square root of 139173029 is about 11797.1619044582. The cubic root of 139173029 is about 518.2249995251.

The spelling of 139173029 in words is "one hundred thirty-nine million, one hundred seventy-three thousand, twenty-nine".