139595161 has 2 divisors, whose sum is σ = 139595162. Its totient is φ = 139595160.

The previous prime is 139595107. The next prime is 139595167. The reversal of 139595161 is 161595931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134119561 + 5475600 = 11581^2 + 2340^2 .

It is a cyclic number.

It is not a de Polignac number, because 139595161 - 2¹³ = 139586969 is a prime.

It is not a weakly prime, because it can be changed into another prime (139595167) 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, 69797580 + 69797581.

It is an arithmetic number, because the mean of its divisors is an integer number (69797581).

Almost surely, 2^139595161 is an apocalyptic number.

It is an amenable number.

139595161 is a deficient number, since it is larger than the sum of its proper divisors (1).

139595161 is an equidigital number, since it uses as much as digits as its factorization.

139595161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36450, while the sum is 40.

The square root of 139595161 is about 11815.0396105980. The cubic root of 139595161 is about 518.7484212271.

The spelling of 139595161 in words is "one hundred thirty-nine million, five hundred ninety-five thousand, one hundred sixty-one".