17139997 has 8 divisors (see below), whose sum is σ = 19791296. Its totient is φ = 14539392.

The previous prime is 17139989. The next prime is 17140021. The reversal of 17139997 is 79993171.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 17139997 - 2³ = 17139989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17139907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11943 + ... + 13300.

It is an arithmetic number, because the mean of its divisors is an integer number (2473912).

Almost surely, 2^17139997 is an apocalyptic number.

It is an amenable number.

17139997 is a deficient number, since it is larger than the sum of its proper divisors (2651299).

17139997 is an equidigital number, since it uses as much as digits as its factorization.

17139997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25347.

The product of its digits is 107163, while the sum is 46.

The square root of 17139997 is about 4140.0479465823. The cubic root of 17139997 is about 257.8320572394.

The spelling of 17139997 in words is "seventeen million, one hundred thirty-nine thousand, nine hundred ninety-seven".