17138986 has 4 divisors (see below), whose sum is σ = 25708482. Its totient is φ = 8569492.

The previous prime is 17138959. The next prime is 17139037. The reversal of 17138986 is 68983171.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68983171 = 1613 ⋅42767.

It can be written as a sum of positive squares in only one way, i.e., 12215025 + 4923961 = 3495^2 + 2219^2 .

It is a super-2 number, since 2×17138986² = 587489682216392, 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, 4284745 + ... + 4284748.

Almost surely, 2^17138986 is an apocalyptic number.

17138986 is a deficient number, since it is larger than the sum of its proper divisors (8569496).

17138986 is an equidigital number, since it uses as much as digits as its factorization.

17138986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8569495.

The product of its digits is 72576, while the sum is 43.

The square root of 17138986 is about 4139.9258447465. The cubic root of 17138986 is about 257.8269877454.

The spelling of 17138986 in words is "seventeen million, one hundred thirty-eight thousand, nine hundred eighty-six".