189966941 has 4 divisors (see below), whose sum is σ = 189995772. Its totient is φ = 189938112.

The previous prime is 189966929. The next prime is 189966943. The reversal of 189966941 is 149669981.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 149669981 = 101 ⋅1481881.

It can be written as a sum of positive squares in 2 ways, for example, as 48594841 + 141372100 = 6971^2 + 11890^2 .

It is a cyclic number.

It is not a de Polignac number, because 189966941 - 2¹⁴ = 189950557 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 (189966943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 875 + ... + 19511.

It is an arithmetic number, because the mean of its divisors is an integer number (47498943).

Almost surely, 2^189966941 is an apocalyptic number.

It is an amenable number.

189966941 is a deficient number, since it is larger than the sum of its proper divisors (28831).

189966941 is a wasteful number, since it uses less digits than its factorization.

189966941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28830.

The product of its digits is 839808, while the sum is 53.

The square root of 189966941 is about 13782.8495239555. The cubic root of 189966941 is about 574.8563633660.

The spelling of 189966941 in words is "one hundred eighty-nine million, nine hundred sixty-six thousand, nine hundred forty-one".