138946586 has 4 divisors (see below), whose sum is σ = 208419882. Its totient is φ = 69473292.

The previous prime is 138946571. The next prime is 138946597. The reversal of 138946586 is 685649831.

138946586 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 685649831 = 17 ⋅40332343.

It can be written as a sum of positive squares in only one way, i.e., 102718225 + 36228361 = 10135^2 + 6019^2 .

It is a super-2 number, since 2×138946586² = 38612307522110792, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34736645 + ... + 34736648.

Almost surely, 2^138946586 is an apocalyptic number.

138946586 is a deficient number, since it is larger than the sum of its proper divisors (69473296).

138946586 is an equidigital number, since it uses as much as digits as its factorization.

138946586 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69473295.

The product of its digits is 1244160, while the sum is 50.

The square root of 138946586 is about 11787.5606467157. The cubic root of 138946586 is about 517.9437857335.

The spelling of 138946586 in words is "one hundred thirty-eight million, nine hundred forty-six thousand, five hundred eighty-six".