165739697 has 2 divisors, whose sum is σ = 165739698. Its totient is φ = 165739696.

The previous prime is 165739663. The next prime is 165739747. The reversal of 165739697 is 796937561.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 149426176 + 16313521 = 12224^2 + 4039^2 .

It is a cyclic number.

It is not a de Polignac number, because 165739697 - 2²² = 161545393 is a prime.

It is not a weakly prime, because it can be changed into another prime (165739397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82869848 + 82869849.

It is an arithmetic number, because the mean of its divisors is an integer number (82869849).

Almost surely, 2^165739697 is an apocalyptic number.

It is an amenable number.

165739697 is a deficient number, since it is larger than the sum of its proper divisors (1).

165739697 is an equidigital number, since it uses as much as digits as its factorization.

165739697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2143260, while the sum is 53.

The square root of 165739697 is about 12873.9930480019. The cubic root of 165739697 is about 549.2990486449.

The spelling of 165739697 in words is "one hundred sixty-five million, seven hundred thirty-nine thousand, six hundred ninety-seven".