17798961 has 16 divisors (see below), whose sum is σ = 24974208. Its totient is φ = 11260800.

The previous prime is 17798959. The next prime is 17798993. The reversal of 17798961 is 16989771.

It is a happy number.

It is not a de Polignac number, because 17798961 - 2¹ = 17798959 is a prime.

It is a super-3 number, since 3×17798961³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 17798961.

It is not an unprimeable number, because it can be changed into a prime (17798951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2596 + ... + 6506.

It is an arithmetic number, because the mean of its divisors is an integer number (1560888).

Almost surely, 2^17798961 is an apocalyptic number.

It is an amenable number.

17798961 is a deficient number, since it is larger than the sum of its proper divisors (7175247).

17798961 is a wasteful number, since it uses less digits than its factorization.

17798961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3992.

The product of its digits is 190512, while the sum is 48.

The square root of 17798961 is about 4218.8814868398. The cubic root of 17798961 is about 261.0947968212.

The spelling of 17798961 in words is "seventeen million, seven hundred ninety-eight thousand, nine hundred sixty-one".