139901 has 2 divisors, whose sum is σ = 139902. Its totient is φ = 139900.

The previous prime is 139891. The next prime is 139907. The reversal of 139901 is 109931.

139901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139876 + 25 = 374^2 + 5^2 .

It is a cyclic number.

It is not a de Polignac number, because 139901 - 2⁶ = 139837 is a prime.

It is a Chen prime.

It is a plaindrome in base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 139901.

It is not a weakly prime, because it can be changed into another prime (139907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69950 + 69951.

It is an arithmetic number, because the mean of its divisors is an integer number (69951).

2¹³⁹⁹⁰¹ is an apocalyptic number.

It is an amenable number.

139901 is a deficient number, since it is larger than the sum of its proper divisors (1).

139901 is an equidigital number, since it uses as much as digits as its factorization.

139901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 243, while the sum is 23.

The square root of 139901 is about 374.0334209666. The cubic root of 139901 is about 51.9126986820.

The spelling of 139901 in words is "one hundred thirty-nine thousand, nine hundred one".