165989822 has 4 divisors (see below), whose sum is σ = 248984736. Its totient is φ = 82994910.

The previous prime is 165989821. The next prime is 165989839. The reversal of 165989822 is 228989561.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165989821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41497454 + ... + 41497457.

It is an arithmetic number, because the mean of its divisors is an integer number (62246184).

Almost surely, 2^165989822 is an apocalyptic number.

165989822 is a deficient number, since it is larger than the sum of its proper divisors (82994914).

165989822 is an equidigital number, since it uses as much as digits as its factorization.

165989822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82994913.

The product of its digits is 622080, while the sum is 50.

The square root of 165989822 is about 12883.7037376680. The cubic root of 165989822 is about 549.5752334686.

The spelling of 165989822 in words is "one hundred sixty-five million, nine hundred eighty-nine thousand, eight hundred twenty-two".