147865139 has 2 divisors, whose sum is σ = 147865140. Its totient is φ = 147865138.

The previous prime is 147865127. The next prime is 147865187. The reversal of 147865139 is 931568741.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 147865139 - 2²⁴ = 131087923 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 147865139.

It is not a weakly prime, because it can be changed into another prime (147865189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73932569 + 73932570.

It is an arithmetic number, because the mean of its divisors is an integer number (73932570).

Almost surely, 2^147865139 is an apocalyptic number.

147865139 is a deficient number, since it is larger than the sum of its proper divisors (1).

147865139 is an equidigital number, since it uses as much as digits as its factorization.

147865139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 44.

The square root of 147865139 is about 12159.9810443931. The cubic root of 147865139 is about 528.7965324454.

The spelling of 147865139 in words is "one hundred forty-seven million, eight hundred sixty-five thousand, one hundred thirty-nine".