165190789 has 2 divisors, whose sum is σ = 165190790. Its totient is φ = 165190788.

The previous prime is 165190783. The next prime is 165190793. The reversal of 165190789 is 987091561.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134165889 + 31024900 = 11583^2 + 5570^2 .

It is a cyclic number.

It is not a de Polignac number, because 165190789 - 2¹¹ = 165188741 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165190783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82595394 + 82595395.

It is an arithmetic number, because the mean of its divisors is an integer number (82595395).

Almost surely, 2^165190789 is an apocalyptic number.

It is an amenable number.

165190789 is a deficient number, since it is larger than the sum of its proper divisors (1).

165190789 is an equidigital number, since it uses as much as digits as its factorization.

165190789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 46.

The square root of 165190789 is about 12852.6568848624. The cubic root of 165190789 is about 548.6919759875.

The spelling of 165190789 in words is "one hundred sixty-five million, one hundred ninety thousand, seven hundred eighty-nine".