139585429 has 2 divisors, whose sum is σ = 139585430. Its totient is φ = 139585428.

The previous prime is 139585427. The next prime is 139585451. The reversal of 139585429 is 924585931.

139585429 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 can be written as a sum of positive squares in only one way, i.e., 84603204 + 54982225 = 9198^2 + 7415^2 .

It is a cyclic number.

It is not a de Polignac number, because 139585429 - 2¹ = 139585427 is a prime.

It is a super-2 number, since 2×139585429² = 38968183978228082, which contains 22 as substring.

Together with 139585427, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139585421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69792714 + 69792715.

It is an arithmetic number, because the mean of its divisors is an integer number (69792715).

Almost surely, 2^139585429 is an apocalyptic number.

It is an amenable number.

139585429 is a deficient number, since it is larger than the sum of its proper divisors (1).

139585429 is an equidigital number, since it uses as much as digits as its factorization.

139585429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 388800, while the sum is 46.

The square root of 139585429 is about 11814.6277554564. The cubic root of 139585429 is about 518.7363659454.

The spelling of 139585429 in words is "one hundred thirty-nine million, five hundred eighty-five thousand, four hundred twenty-nine".