165693379 has 2 divisors, whose sum is σ = 165693380. Its totient is φ = 165693378.

The previous prime is 165693349. The next prime is 165693401. The reversal of 165693379 is 973396561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165693379 - 2⁹ = 165692867 is a prime.

It is not a weakly prime, because it can be changed into another prime (165693329) 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, 82846689 + 82846690.

It is an arithmetic number, because the mean of its divisors is an integer number (82846690).

Almost surely, 2^165693379 is an apocalyptic number.

165693379 is a deficient number, since it is larger than the sum of its proper divisors (1).

165693379 is an equidigital number, since it uses as much as digits as its factorization.

165693379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 918540, while the sum is 49.

The square root of 165693379 is about 12872.1940243301. The cubic root of 165693379 is about 549.2478744156.

The spelling of 165693379 in words is "one hundred sixty-five million, six hundred ninety-three thousand, three hundred seventy-nine".