138964583 has 4 divisors (see below), whose sum is σ = 139055280. Its totient is φ = 138873888.

The previous prime is 138964561. The next prime is 138964589. The reversal of 138964583 is 385469831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 385469831 = 1801 ⋅214031.

It is a cyclic number.

It is not a de Polignac number, because 138964583 - 2¹² = 138960487 is a prime.

It is a super-2 number, since 2×138964583² = 38622310656727778, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138964589) 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 in 3 ways as a sum of consecutive naturals, for example, 43010 + ... + 46127.

It is an arithmetic number, because the mean of its divisors is an integer number (34763820).

Almost surely, 2^138964583 is an apocalyptic number.

138964583 is a deficient number, since it is larger than the sum of its proper divisors (90697).

138964583 is an equidigital number, since it uses as much as digits as its factorization.

138964583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90696.

The product of its digits is 622080, while the sum is 47.

The square root of 138964583 is about 11788.3240114954. The cubic root of 138964583 is about 517.9661469208.

The spelling of 138964583 in words is "one hundred thirty-eight million, nine hundred sixty-four thousand, five hundred eighty-three".