139965061 has 2 divisors, whose sum is σ = 139965062. Its totient is φ = 139965060.

The previous prime is 139965041. The next prime is 139965073. The reversal of 139965061 is 160569931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99400900 + 40564161 = 9970^2 + 6369^2 .

It is a cyclic number.

It is not a de Polignac number, because 139965061 - 2⁹ = 139964549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139965041) 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, 69982530 + 69982531.

It is an arithmetic number, because the mean of its divisors is an integer number (69982531).

Almost surely, 2^139965061 is an apocalyptic number.

It is an amenable number.

139965061 is a deficient number, since it is larger than the sum of its proper divisors (1).

139965061 is an equidigital number, since it uses as much as digits as its factorization.

139965061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 139965061 is about 11830.6830318456. The cubic root of 139965061 is about 519.2062112219.

The spelling of 139965061 in words is "one hundred thirty-nine million, nine hundred sixty-five thousand, sixty-one".