53139389 has 2 divisors, whose sum is σ = 53139390. Its totient is φ = 53139388.

The previous prime is 53139379. The next prime is 53139431. The reversal of 53139389 is 98393135.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29539225 + 23600164 = 5435^2 + 4858^2 .

It is a cyclic number.

It is not a de Polignac number, because 53139389 - 2²⁰ = 52090813 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53139329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26569694 + 26569695.

It is an arithmetic number, because the mean of its divisors is an integer number (26569695).

Almost surely, 2^53139389 is an apocalyptic number.

It is an amenable number.

53139389 is a deficient number, since it is larger than the sum of its proper divisors (1).

53139389 is an equidigital number, since it uses as much as digits as its factorization.

53139389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87480, while the sum is 41.

The square root of 53139389 is about 7289.6768789844. The cubic root of 53139389 is about 375.9575858487.

The spelling of 53139389 in words is "fifty-three million, one hundred thirty-nine thousand, three hundred eighty-nine".