189836539 has 2 divisors, whose sum is σ = 189836540. Its totient is φ = 189836538.

The previous prime is 189836531. The next prime is 189836561. The reversal of 189836539 is 935638981.

It is a weak prime.

It is an emirp because it is prime and its reverse (935638981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189836539 - 2³ = 189836531 is a prime.

It is not a weakly prime, because it can be changed into another prime (189836531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94918269 + 94918270.

It is an arithmetic number, because the mean of its divisors is an integer number (94918270).

Almost surely, 2^189836539 is an apocalyptic number.

189836539 is a deficient number, since it is larger than the sum of its proper divisors (1).

189836539 is an equidigital number, since it uses as much as digits as its factorization.

189836539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1399680, while the sum is 52.

The square root of 189836539 is about 13778.1181225884. The cubic root of 189836539 is about 574.7247973539.

The spelling of 189836539 in words is "one hundred eighty-nine million, eight hundred thirty-six thousand, five hundred thirty-nine".