165708953 has 2 divisors, whose sum is σ = 165708954. Its totient is φ = 165708952.

The previous prime is 165708931. The next prime is 165708967. The reversal of 165708953 is 359807561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 162129289 + 3579664 = 12733^2 + 1892^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165708953 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (165708913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82854476 + 82854477.

It is an arithmetic number, because the mean of its divisors is an integer number (82854477).

Almost surely, 2^165708953 is an apocalyptic number.

It is an amenable number.

165708953 is a deficient number, since it is larger than the sum of its proper divisors (1).

165708953 is an equidigital number, since it uses as much as digits as its factorization.

165708953 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 226800, while the sum is 44.

The square root of 165708953 is about 12872.7989574917. The cubic root of 165708953 is about 549.2650823420.

It can be divided in two parts, 165708 and 953, that added together give a palindrome (166661).

The spelling of 165708953 in words is "one hundred sixty-five million, seven hundred eight thousand, nine hundred fifty-three".