139258069 has 2 divisors, whose sum is σ = 139258070. Its totient is φ = 139258068.

The previous prime is 139258061. The next prime is 139258079. The reversal of 139258069 is 960852931.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125664100 + 13593969 = 11210^2 + 3687^2 .

It is a cyclic number.

It is not a de Polignac number, because 139258069 - 2³ = 139258061 is a prime.

It is a super-2 number, since 2×139258069² = 38785619563217522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139258061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69629034 + 69629035.

It is an arithmetic number, because the mean of its divisors is an integer number (69629035).

Almost surely, 2^139258069 is an apocalyptic number.

It is an amenable number.

139258069 is a deficient number, since it is larger than the sum of its proper divisors (1).

139258069 is an equidigital number, since it uses as much as digits as its factorization.

139258069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 139258069 is about 11800.7656107559. The cubic root of 139258069 is about 518.3305297445.

The spelling of 139258069 in words is "one hundred thirty-nine million, two hundred fifty-eight thousand, sixty-nine".