165989422 has 4 divisors (see below), whose sum is σ = 248984136. Its totient is φ = 82994710.

The previous prime is 165989387. The next prime is 165989423. The reversal of 165989422 is 224989561.

165989422 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (165989423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41497354 + ... + 41497357.

It is an arithmetic number, because the mean of its divisors is an integer number (62246034).

Almost surely, 2^165989422 is an apocalyptic number.

165989422 is a deficient number, since it is larger than the sum of its proper divisors (82994714).

165989422 is an equidigital number, since it uses as much as digits as its factorization.

165989422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82994713.

The product of its digits is 311040, while the sum is 46.

The square root of 165989422 is about 12883.6882141722. The cubic root of 165989422 is about 549.5747920153.

The spelling of 165989422 in words is "one hundred sixty-five million, nine hundred eighty-nine thousand, four hundred twenty-two".