189360139 has 2 divisors, whose sum is σ = 189360140. Its totient is φ = 189360138.

The previous prime is 189360109. The next prime is 189360151. The reversal of 189360139 is 931063981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 189360139 - 2⁷ = 189360011 is a prime.

It is not a weakly prime, because it can be changed into another prime (189360109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94680069 + 94680070.

It is an arithmetic number, because the mean of its divisors is an integer number (94680070).

Almost surely, 2^189360139 is an apocalyptic number.

189360139 is a deficient number, since it is larger than the sum of its proper divisors (1).

189360139 is an equidigital number, since it uses as much as digits as its factorization.

189360139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 189360139 is about 13760.8189799881. The cubic root of 189360139 is about 574.2436320840.

The spelling of 189360139 in words is "one hundred eighty-nine million, three hundred sixty thousand, one hundred thirty-nine".