189816941 has 2 divisors, whose sum is σ = 189816942. Its totient is φ = 189816940.

The previous prime is 189816901. The next prime is 189816961. The reversal of 189816941 is 149618981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152423716 + 37393225 = 12346^2 + 6115^2 .

It is an emirp because it is prime and its reverse (149618981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189816941 - 2⁶ = 189816877 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189816901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94908470 + 94908471.

It is an arithmetic number, because the mean of its divisors is an integer number (94908471).

Almost surely, 2^189816941 is an apocalyptic number.

It is an amenable number.

189816941 is a deficient number, since it is larger than the sum of its proper divisors (1).

189816941 is an equidigital number, since it uses as much as digits as its factorization.

189816941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 47.

The square root of 189816941 is about 13777.4069040585. The cubic root of 189816941 is about 574.7050192082.

The spelling of 189816941 in words is "one hundred eighty-nine million, eight hundred sixteen thousand, nine hundred forty-one".