165937979 has 8 divisors (see below), whose sum is σ = 168572592. Its totient is φ = 163313280.

The previous prime is 165937973. The next prime is 165938011. The reversal of 165937979 is 979739561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165937979 - 2¹² = 165933883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165937973) 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 in 7 ways as a sum of consecutive naturals, for example, 35852 + ... + 40214.

It is an arithmetic number, because the mean of its divisors is an integer number (21071574).

Almost surely, 2^165937979 is an apocalyptic number.

165937979 is a deficient number, since it is larger than the sum of its proper divisors (2634613).

165937979 is an equidigital number, since it uses as much as digits as its factorization.

165937979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4957.

The product of its digits is 3214890, while the sum is 56.

The square root of 165937979 is about 12881.6916202803. The cubic root of 165937979 is about 549.5180118967.

The spelling of 165937979 in words is "one hundred sixty-five million, nine hundred thirty-seven thousand, nine hundred seventy-nine".