189796309 has 2 divisors, whose sum is σ = 189796310. Its totient is φ = 189796308.

The previous prime is 189796297. The next prime is 189796351. The reversal of 189796309 is 903697981.

189796309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95609284 + 94187025 = 9778^2 + 9705^2 .

It is a cyclic number.

It is not a de Polignac number, because 189796309 - 2⁷ = 189796181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189790309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94898154 + 94898155.

It is an arithmetic number, because the mean of its divisors is an integer number (94898155).

Almost surely, 2^189796309 is an apocalyptic number.

It is an amenable number.

189796309 is a deficient number, since it is larger than the sum of its proper divisors (1).

189796309 is an equidigital number, since it uses as much as digits as its factorization.

189796309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 734832, while the sum is 52.

The square root of 189796309 is about 13776.6581216201. The cubic root of 189796309 is about 574.6841960868.

The spelling of 189796309 in words is "one hundred eighty-nine million, seven hundred ninety-six thousand, three hundred nine".