17661113 has 8 divisors (see below), whose sum is σ = 18779040. Its totient is φ = 16552000.

The previous prime is 17661097. The next prime is 17661121. The reversal of 17661113 is 31116671.

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

It is a cyclic number.

It is not a de Polignac number, because 17661113 - 2⁴ = 17661097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17661713) 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, 2198 + ... + 6336.

It is an arithmetic number, because the mean of its divisors is an integer number (2347380).

Almost surely, 2^17661113 is an apocalyptic number.

It is an amenable number.

17661113 is a deficient number, since it is larger than the sum of its proper divisors (1117927).

17661113 is a wasteful number, since it uses less digits than its factorization.

17661113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4407.

The product of its digits is 756, while the sum is 26.

The square root of 17661113 is about 4202.5127007542. The cubic root of 17661113 is about 260.4190137076.

Adding to 17661113 its reverse (31116671), we get a palindrome (48777784).

The spelling of 17661113 in words is "seventeen million, six hundred sixty-one thousand, one hundred thirteen".