139090169 has 2 divisors, whose sum is σ = 139090170. Its totient is φ = 139090168.

The previous prime is 139090157. The next prime is 139090181. The reversal of 139090169 is 961090931.

It is a balanced prime because it is at equal distance from previous prime (139090157) and next prime (139090181).

It can be written as a sum of positive squares in only one way, i.e., 138956944 + 133225 = 11788^2 + 365^2 .

It is a cyclic number.

It is not a de Polignac number, because 139090169 - 2⁴ = 139090153 is a prime.

It is a super-2 number, since 2×139090169² = 38692150224897122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (139090109) 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, 69545084 + 69545085.

It is an arithmetic number, because the mean of its divisors is an integer number (69545085).

Almost surely, 2^139090169 is an apocalyptic number.

It is an amenable number.

139090169 is a deficient number, since it is larger than the sum of its proper divisors (1).

139090169 is an equidigital number, since it uses as much as digits as its factorization.

139090169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13122, while the sum is 38.

The square root of 139090169 is about 11793.6495199747. The cubic root of 139090169 is about 518.1221332145.

The spelling of 139090169 in words is "one hundred thirty-nine million, ninety thousand, one hundred sixty-nine".