189509039 has 2 divisors, whose sum is σ = 189509040. Its totient is φ = 189509038.

The previous prime is 189509009. The next prime is 189509053. The reversal of 189509039 is 930905981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 189509039 - 2¹⁶ = 189443503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189509009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94754519 + 94754520.

It is an arithmetic number, because the mean of its divisors is an integer number (94754520).

Almost surely, 2^189509039 is an apocalyptic number.

189509039 is a deficient number, since it is larger than the sum of its proper divisors (1).

189509039 is an equidigital number, since it uses as much as digits as its factorization.

189509039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87480, while the sum is 44.

The square root of 189509039 is about 13766.2282052856. The cubic root of 189509039 is about 574.3941080946.

The spelling of 189509039 in words is "one hundred eighty-nine million, five hundred nine thousand, thirty-nine".