189703661 has 4 divisors (see below), whose sum is σ = 216804192. Its totient is φ = 162603132.

The previous prime is 189703651. The next prime is 189703667. The reversal of 189703661 is 166307981.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 189703661 - 2¹⁰ = 189702637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189703667) 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, 13550255 + ... + 13550268.

It is an arithmetic number, because the mean of its divisors is an integer number (54201048).

Almost surely, 2^189703661 is an apocalyptic number.

It is an amenable number.

189703661 is a deficient number, since it is larger than the sum of its proper divisors (27100531).

189703661 is an equidigital number, since it uses as much as digits as its factorization.

189703661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27100530.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 189703661 is about 13773.2952121125. The cubic root of 189703661 is about 574.5906712487.

The spelling of 189703661 in words is "one hundred eighty-nine million, seven hundred three thousand, six hundred sixty-one".