139164161 has 2 divisors, whose sum is σ = 139164162. Its totient is φ = 139164160.

The previous prime is 139164139. The next prime is 139164197. The reversal of 139164161 is 161461931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131239936 + 7924225 = 11456^2 + 2815^2 .

It is a cyclic number.

It is not a de Polignac number, because 139164161 - 2¹⁰ = 139163137 is a prime.

It is not a weakly prime, because it can be changed into another prime (139164101) 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, 69582080 + 69582081.

It is an arithmetic number, because the mean of its divisors is an integer number (69582081).

Almost surely, 2^139164161 is an apocalyptic number.

It is an amenable number.

139164161 is a deficient number, since it is larger than the sum of its proper divisors (1).

139164161 is an equidigital number, since it uses as much as digits as its factorization.

139164161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 32.

The square root of 139164161 is about 11796.7860453600. The cubic root of 139164161 is about 518.2139923231.

The spelling of 139164161 in words is "one hundred thirty-nine million, one hundred sixty-four thousand, one hundred sixty-one".