17138989 has 4 divisors (see below), whose sum is σ = 19587424. Its totient is φ = 14690556.

The previous prime is 17138959. The next prime is 17139037. The reversal of 17138989 is 98983171.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 17138989 - 2¹³ = 17130797 is a prime.

It is a Duffinian number.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 1224207 + ... + 1224220.

It is an arithmetic number, because the mean of its divisors is an integer number (4896856).

Almost surely, 2^17138989 is an apocalyptic number.

It is an amenable number.

17138989 is a deficient number, since it is larger than the sum of its proper divisors (2448435).

17138989 is an equidigital number, since it uses as much as digits as its factorization.

17138989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2448434.

The product of its digits is 108864, while the sum is 46.

The square root of 17138989 is about 4139.9262070718. The cubic root of 17138989 is about 257.8270027887.

The spelling of 17138989 in words is "seventeen million, one hundred thirty-eight thousand, nine hundred eighty-nine".