138099586 has 4 divisors (see below), whose sum is σ = 207149382. Its totient is φ = 69049792.

The previous prime is 138099571. The next prime is 138099629. The reversal of 138099586 is 685990831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 685990831 = 11743 ⋅58417.

It can be written as a sum of positive squares in only one way, i.e., 134119561 + 3980025 = 11581^2 + 1995^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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, 34524895 + ... + 34524898.

Almost surely, 2^138099586 is an apocalyptic number.

138099586 is a deficient number, since it is larger than the sum of its proper divisors (69049796).

138099586 is an equidigital number, since it uses as much as digits as its factorization.

138099586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69049795.

The product of its (nonzero) digits is 466560, while the sum is 49.

The square root of 138099586 is about 11751.5780216956. The cubic root of 138099586 is about 516.8892010279.

The spelling of 138099586 in words is "one hundred thirty-eight million, ninety-nine thousand, five hundred eighty-six".