17990169 has 8 divisors (see below), whose sum is σ = 25249440. Its totient is φ = 11362176.

The previous prime is 17990153. The next prime is 17990183. The reversal of 17990169 is 96109971.

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

It is not a de Polignac number, because 17990169 - 2⁴ = 17990153 is a prime.

It is a super-2 number, since 2×17990169² = 647292361297122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 17990169.

It is not an unprimeable number, because it can be changed into a prime (17990149) 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, 157752 + ... + 157865.

It is an arithmetic number, because the mean of its divisors is an integer number (3156180).

Almost surely, 2^17990169 is an apocalyptic number.

17990169 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

17990169 is a deficient number, since it is larger than the sum of its proper divisors (7259271).

17990169 is a wasteful number, since it uses less digits than its factorization.

17990169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315639.

The product of its (nonzero) digits is 30618, while the sum is 42.

The square root of 17990169 is about 4241.4819344187. The cubic root of 17990169 is about 262.0264186790.

The spelling of 17990169 in words is "seventeen million, nine hundred ninety thousand, one hundred sixty-nine".