165630139 has 2 divisors, whose sum is σ = 165630140. Its totient is φ = 165630138.

The previous prime is 165630121. The next prime is 165630151. The reversal of 165630139 is 931036561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165630139 - 2¹³ = 165621947 is a prime.

It is not a weakly prime, because it can be changed into another prime (165630739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82815069 + 82815070.

It is an arithmetic number, because the mean of its divisors is an integer number (82815070).

Almost surely, 2^165630139 is an apocalyptic number.

165630139 is a deficient number, since it is larger than the sum of its proper divisors (1).

165630139 is an equidigital number, since it uses as much as digits as its factorization.

165630139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14580, while the sum is 34.

The square root of 165630139 is about 12869.7373322069. The cubic root of 165630139 is about 549.1779885905.

The spelling of 165630139 in words is "one hundred sixty-five million, six hundred thirty thousand, one hundred thirty-nine".