165392990 has 16 divisors (see below), whose sum is σ = 340237152. Its totient is φ = 56706144.

The previous prime is 165392987. The next prime is 165392993. The reversal of 165392990 is 99293561.

It is an interprime number because it is at equal distance from previous prime (165392987) and next prime (165392993).

It is a super-2 number, since 2×165392990² = 54709682282280200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165392993) 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 in 7 ways as a sum of consecutive naturals, for example, 1181309 + ... + 1181448.

It is an arithmetic number, because the mean of its divisors is an integer number (21264822).

Almost surely, 2^165392990 is an apocalyptic number.

165392990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165392990 is an abundant number, since it is smaller than the sum of its proper divisors (174844162).

165392990 is a wasteful number, since it uses less digits than its factorization.

165392990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2362771.

The product of its (nonzero) digits is 131220, while the sum is 44.

The square root of 165392990 is about 12860.5205959945. The cubic root of 165392990 is about 548.9157593070.

The spelling of 165392990 in words is "one hundred sixty-five million, three hundred ninety-two thousand, nine hundred ninety".