189030811 has 2 divisors, whose sum is σ = 189030812. Its totient is φ = 189030810.

The previous prime is 189030763. The next prime is 189030823. The reversal of 189030811 is 118030981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 189030811 - 2⁷ = 189030683 is a prime.

It is not a weakly prime, because it can be changed into another prime (189030841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94515405 + 94515406.

It is an arithmetic number, because the mean of its divisors is an integer number (94515406).

Almost surely, 2^189030811 is an apocalyptic number.

189030811 is a deficient number, since it is larger than the sum of its proper divisors (1).

189030811 is an equidigital number, since it uses as much as digits as its factorization.

189030811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 31.

The square root of 189030811 is about 13748.8476244375. The cubic root of 189030811 is about 573.9105379641.

The spelling of 189030811 in words is "one hundred eighty-nine million, thirty thousand, eight hundred eleven".