190668617 has 12 divisors (see below), whose sum is σ = 203616540. Its totient is φ = 178541888.

The previous prime is 190668601. The next prime is 190668619. The reversal of 190668617 is 716866091.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 6 ways, for example, as 77862976 + 112805641 = 8824^2 + 10621^2 .

It is not a de Polignac number, because 190668617 - 2⁴ = 190668601 is a prime.

It is a super-3 number, since 3×190668617³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190668619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 967763 + ... + 967959.

It is an arithmetic number, because the mean of its divisors is an integer number (16968045).

Almost surely, 2^190668617 is an apocalyptic number.

190668617 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

190668617 is a deficient number, since it is larger than the sum of its proper divisors (12947923).

190668617 is an frugal number, since it uses more digits than its factorization.

190668617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445 (or 214 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 190668617 is about 13808.2807401935. The cubic root of 190668617 is about 575.5632711008.

The spelling of 190668617 in words is "one hundred ninety million, six hundred sixty-eight thousand, six hundred seventeen".