139361 has 2 divisors, whose sum is σ = 139362. Its totient is φ = 139360.

The previous prime is 139343. The next prime is 139367. The reversal of 139361 is 163931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118336 + 21025 = 344^2 + 145^2 .

It is a cyclic number.

It is not a de Polignac number, because 139361 - 2⁶ = 139297 is a prime.

It is not a weakly prime, because it can be changed into another prime (139367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69680 + 69681.

It is an arithmetic number, because the mean of its divisors is an integer number (69681).

2¹³⁹³⁶¹ is an apocalyptic number.

It is an amenable number.

139361 is a deficient number, since it is larger than the sum of its proper divisors (1).

139361 is an equidigital number, since it uses as much as digits as its factorization.

139361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 486, while the sum is 23.

The square root of 139361 is about 373.3108624190. The cubic root of 139361 is about 51.8458204310.

The spelling of 139361 in words is "one hundred thirty-nine thousand, three hundred sixty-one".