165765983 has 2 divisors, whose sum is σ = 165765984. Its totient is φ = 165765982.

The previous prime is 165765953. The next prime is 165766067. The reversal of 165765983 is 389567561.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165765983 - 2¹⁴ = 165749599 is a prime.

It is a super-2 number, since 2×165765983² = 54956722239912578, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165765913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82882991 + 82882992.

It is an arithmetic number, because the mean of its divisors is an integer number (82882992).

Almost surely, 2^165765983 is an apocalyptic number.

165765983 is a deficient number, since it is larger than the sum of its proper divisors (1).

165765983 is an equidigital number, since it uses as much as digits as its factorization.

165765983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1360800, while the sum is 50.

The square root of 165765983 is about 12875.0139029051. The cubic root of 165765983 is about 549.3280863705.

The spelling of 165765983 in words is "one hundred sixty-five million, seven hundred sixty-five thousand, nine hundred eighty-three".