138658519 has 2 divisors, whose sum is σ = 138658520. Its totient is φ = 138658518.

The previous prime is 138658469. The next prime is 138658603. The reversal of 138658519 is 915856831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138658519 - 2¹³ = 138650327 is a prime.

It is a super-2 number, since 2×138658519² = 38452369782546722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138653519) 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, 69329259 + 69329260.

It is an arithmetic number, because the mean of its divisors is an integer number (69329260).

Almost surely, 2^138658519 is an apocalyptic number.

138658519 is a deficient number, since it is larger than the sum of its proper divisors (1).

138658519 is an equidigital number, since it uses as much as digits as its factorization.

138658519 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 259200, while the sum is 46.

The square root of 138658519 is about 11775.3351969275. The cubic root of 138658519 is about 517.5856007511.

The spelling of 138658519 in words is "one hundred thirty-eight million, six hundred fifty-eight thousand, five hundred nineteen".