165764069 has 2 divisors, whose sum is σ = 165764070. Its totient is φ = 165764068.

The previous prime is 165764063. The next prime is 165764077. The reversal of 165764069 is 960467561.

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., 86731969 + 79032100 = 9313^2 + 8890^2 .

It is a cyclic number.

It is not a de Polignac number, because 165764069 - 2⁸ = 165763813 is a prime.

It is a super-2 number, since 2×165764069² = 54955453142873522, which contains 22 as substring.

It is equal to p_9279188 and since 165764069 and 9279188 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165764063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82882034 + 82882035.

It is an arithmetic number, because the mean of its divisors is an integer number (82882035).

Almost surely, 2^165764069 is an apocalyptic number.

It is an amenable number.

165764069 is a deficient number, since it is larger than the sum of its proper divisors (1).

165764069 is an equidigital number, since it uses as much as digits as its factorization.

165764069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 165764069 is about 12874.9395726737. The cubic root of 165764069 is about 549.3259721089.

The spelling of 165764069 in words is "one hundred sixty-five million, seven hundred sixty-four thousand, sixty-nine".