165867983 has 2 divisors, whose sum is σ = 165867984. Its totient is φ = 165867982.

The previous prime is 165867971. The next prime is 165868013. The reversal of 165867983 is 389768561.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165867983 - 2¹⁶ = 165802447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165867943) 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, 82933991 + 82933992.

It is an arithmetic number, because the mean of its divisors is an integer number (82933992).

Almost surely, 2^165867983 is an apocalyptic number.

165867983 is a deficient number, since it is larger than the sum of its proper divisors (1).

165867983 is an equidigital number, since it uses as much as digits as its factorization.

165867983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2177280, while the sum is 53.

The square root of 165867983 is about 12878.9744545131. The cubic root of 165867983 is about 549.4407350881.

The spelling of 165867983 in words is "one hundred sixty-five million, eight hundred sixty-seven thousand, nine hundred eighty-three".