17138906 has 4 divisors (see below), whose sum is σ = 25708362. Its totient is φ = 8569452.

The previous prime is 17138857. The next prime is 17138909. The reversal of 17138906 is 60983171.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60983171 = 83 ⋅734737.

It can be written as a sum of positive squares in only one way, i.e., 16883881 + 255025 = 4109^2 + 505^2 .

It is not an unprimeable number, because it can be changed into a prime (17138909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4284725 + ... + 4284728.

Almost surely, 2^17138906 is an apocalyptic number.

17138906 is a deficient number, since it is larger than the sum of its proper divisors (8569456).

17138906 is an equidigital number, since it uses as much as digits as its factorization.

17138906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8569455.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 17138906 is about 4139.9161827264. The cubic root of 17138906 is about 257.8265865900.

The spelling of 17138906 in words is "seventeen million, one hundred thirty-eight thousand, nine hundred six".