165597379 has 2 divisors, whose sum is σ = 165597380. Its totient is φ = 165597378.

The previous prime is 165597353. The next prime is 165597413. The reversal of 165597379 is 973795561.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (973795561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165597379 - 2¹³ = 165589187 is a prime.

It is not a weakly prime, because it can be changed into another prime (165597979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82798689 + 82798690.

It is an arithmetic number, because the mean of its divisors is an integer number (82798690).

Almost surely, 2^165597379 is an apocalyptic number.

165597379 is a deficient number, since it is larger than the sum of its proper divisors (1).

165597379 is an equidigital number, since it uses as much as digits as its factorization.

165597379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1786050, while the sum is 52.

The square root of 165597379 is about 12868.4645160174. The cubic root of 165597379 is about 549.1417788819.

The spelling of 165597379 in words is "one hundred sixty-five million, five hundred ninety-seven thousand, three hundred seventy-nine".