165684097 has 2 divisors, whose sum is σ = 165684098. Its totient is φ = 165684096.

The previous prime is 165684067. The next prime is 165684107. The reversal of 165684097 is 790486561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 165482496 + 201601 = 12864^2 + 449^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165684097 is a prime.

It is not a weakly prime, because it can be changed into another prime (165684037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82842048 + 82842049.

It is an arithmetic number, because the mean of its divisors is an integer number (82842049).

Almost surely, 2^165684097 is an apocalyptic number.

It is an amenable number.

165684097 is a deficient number, since it is larger than the sum of its proper divisors (1).

165684097 is an equidigital number, since it uses as much as digits as its factorization.

165684097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 165684097 is about 12871.8334746842. The cubic root of 165684097 is about 549.2376180936.

The spelling of 165684097 in words is "one hundred sixty-five million, six hundred eighty-four thousand, ninety-seven".