52000139 has 2 divisors, whose sum is σ = 52000140. Its totient is φ = 52000138.

The previous prime is 52000087. The next prime is 52000159. The reversal of 52000139 is 93100025.

It is an a-pointer prime, because the next prime (52000159) can be obtained adding 52000139 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52000139 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 52000139.

It is not a weakly prime, because it can be changed into another prime (52000159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26000069 + 26000070.

It is an arithmetic number, because the mean of its divisors is an integer number (26000070).

Almost surely, 2^52000139 is an apocalyptic number.

52000139 is a deficient number, since it is larger than the sum of its proper divisors (1).

52000139 is an equidigital number, since it uses as much as digits as its factorization.

52000139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 52000139 is about 7211.1121888374. The cubic root of 52000139 is about 373.2514482577.

The spelling of 52000139 in words is "fifty-two million, one hundred thirty-nine", and thus it is an aban number.