189066811 has 2 divisors, whose sum is σ = 189066812. Its totient is φ = 189066810.

The previous prime is 189066793. The next prime is 189066817. The reversal of 189066811 is 118660981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 189066811 - 2¹³ = 189058619 is a prime.

It is not a weakly prime, because it can be changed into another prime (189066817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94533405 + 94533406.

It is an arithmetic number, because the mean of its divisors is an integer number (94533406).

Almost surely, 2^189066811 is an apocalyptic number.

189066811 is a deficient number, since it is larger than the sum of its proper divisors (1).

189066811 is an equidigital number, since it uses as much as digits as its factorization.

189066811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 40.

The square root of 189066811 is about 13750.1567627427. The cubic root of 189066811 is about 573.9469684765.

The spelling of 189066811 in words is "one hundred eighty-nine million, sixty-six thousand, eight hundred eleven".