165392090 has 8 divisors (see below), whose sum is σ = 297705780. Its totient is φ = 66156832.

The previous prime is 165392089. The next prime is 165392119. The reversal of 165392090 is 90293561.

It can be written as a sum of positive squares in 2 ways, for example, as 164378041 + 1014049 = 12821^2 + 1007^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 165392090.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8269595 + ... + 8269614.

Almost surely, 2^165392090 is an apocalyptic number.

165392090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165392090 is a deficient number, since it is larger than the sum of its proper divisors (132313690).

165392090 is a wasteful number, since it uses less digits than its factorization.

165392090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16539216.

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 165392090 is about 12860.4856051395. The cubic root of 165392090 is about 548.9147636480.

The spelling of 165392090 in words is "one hundred sixty-five million, three hundred ninety-two thousand, ninety".