165385379 has 4 divisors (see below), whose sum is σ = 167022960. Its totient is φ = 163747800.

The previous prime is 165385361. The next prime is 165385393. The reversal of 165385379 is 973583561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 165385379 - 2⁸ = 165385123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165385309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 818639 + ... + 818840.

It is an arithmetic number, because the mean of its divisors is an integer number (41755740).

Almost surely, 2^165385379 is an apocalyptic number.

165385379 is a deficient number, since it is larger than the sum of its proper divisors (1637581).

165385379 is a wasteful number, since it uses less digits than its factorization.

165385379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1637580.

The product of its digits is 680400, while the sum is 47.

The square root of 165385379 is about 12860.2246869952. The cubic root of 165385379 is about 548.9073392365.

The spelling of 165385379 in words is "one hundred sixty-five million, three hundred eighty-five thousand, three hundred seventy-nine".