106720189 has 4 divisors (see below), whose sum is σ = 106905724. Its totient is φ = 106534656.

The previous prime is 106720157. The next prime is 106720193. The reversal of 106720189 is 981027601.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 103327225 + 3392964 = 10165^2 + 1842^2 .

It is a cyclic number.

It is not a de Polignac number, because 106720189 - 2⁵ = 106720157 is a prime.

It is a super-3 number, since 3×106720189³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106720129) 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 3 ways as a sum of consecutive naturals, for example, 91902 + ... + 93055.

It is an arithmetic number, because the mean of its divisors is an integer number (26726431).

Almost surely, 2^106720189 is an apocalyptic number.

It is an amenable number.

106720189 is a deficient number, since it is larger than the sum of its proper divisors (185535).

106720189 is an equidigital number, since it uses as much as digits as its factorization.

106720189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185534.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 106720189 is about 10330.5464037484. The cubic root of 106720189 is about 474.3317495139.

The spelling of 106720189 in words is "one hundred six million, seven hundred twenty thousand, one hundred eighty-nine".