138582739 has 2 divisors, whose sum is σ = 138582740. Its totient is φ = 138582738.

The previous prime is 138582721. The next prime is 138582767. The reversal of 138582739 is 937285831.

It is a weak prime.

It is an emirp because it is prime and its reverse (937285831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138582739 - 2⁷ = 138582611 is a prime.

It is a super-3 number, since 3×138582739³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (138582139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69291369 + 69291370.

It is an arithmetic number, because the mean of its divisors is an integer number (69291370).

Almost surely, 2^138582739 is an apocalyptic number.

138582739 is a deficient number, since it is larger than the sum of its proper divisors (1).

138582739 is an equidigital number, since it uses as much as digits as its factorization.

138582739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 46.

The square root of 138582739 is about 11772.1170143692. The cubic root of 138582739 is about 517.4912928436.

The spelling of 138582739 in words is "one hundred thirty-eight million, five hundred eighty-two thousand, seven hundred thirty-nine".