139511 has 2 divisors, whose sum is σ = 139512. Its totient is φ = 139510.

The previous prime is 139501. The next prime is 139537. The reversal of 139511 is 115931.

139511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (115931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139511 - 2¹⁴ = 123127 is a prime.

It is a Sophie Germain prime.

It is a plaindrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69755 + 69756.

It is an arithmetic number, because the mean of its divisors is an integer number (69756).

2¹³⁹⁵¹¹ is an apocalyptic number.

139511 is a deficient number, since it is larger than the sum of its proper divisors (1).

139511 is an equidigital number, since it uses as much as digits as its factorization.

139511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 135, while the sum is 20.

The square root of 139511 is about 373.5117133371. The cubic root of 139511 is about 51.8644150271.

The spelling of 139511 in words is "one hundred thirty-nine thousand, five hundred eleven".