165622939 has 2 divisors, whose sum is σ = 165622940. Its totient is φ = 165622938.

The previous prime is 165622927. The next prime is 165622957. The reversal of 165622939 is 939226561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165622939 - 2⁹ = 165622427 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 165622895 and 165622904.

It is not a weakly prime, because it can be changed into another prime (165622909) 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, 82811469 + 82811470.

It is an arithmetic number, because the mean of its divisors is an integer number (82811470).

Almost surely, 2^165622939 is an apocalyptic number.

165622939 is a deficient number, since it is larger than the sum of its proper divisors (1).

165622939 is an equidigital number, since it uses as much as digits as its factorization.

165622939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 174960, while the sum is 43.

The square root of 165622939 is about 12869.4576031782. The cubic root of 165622939 is about 549.1700308222.

The spelling of 165622939 in words is "one hundred sixty-five million, six hundred twenty-two thousand, nine hundred thirty-nine".