189065409 has 16 divisors (see below), whose sum is σ = 285768000. Its totient is φ = 110223936.

The previous prime is 189065399. The next prime is 189065419. The reversal of 189065409 is 904560981.

It is an interprime number because it is at equal distance from previous prime (189065399) and next prime (189065419).

It is not a de Polignac number, because 189065409 - 2¹¹ = 189063361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (189065419) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126834 + ... + 128315.

It is an arithmetic number, because the mean of its divisors is an integer number (17860500).

Almost surely, 2^189065409 is an apocalyptic number.

189065409 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

189065409 is a deficient number, since it is larger than the sum of its proper divisors (96702591).

189065409 is a wasteful number, since it uses less digits than its factorization.

189065409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255184.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 189065409 is about 13750.1057814113. The cubic root of 189065409 is about 573.9455497970.

The spelling of 189065409 in words is "one hundred eighty-nine million, sixty-five thousand, four hundred nine".