165093691 has 12 divisors (see below), whose sum is σ = 193955040. Its totient is φ = 140103600.

The previous prime is 165093671. The next prime is 165093697. The reversal of 165093691 is 196390561.

It is not a de Polignac number, because 165093691 - 2⁵ = 165093659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165093697) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11731 + ... + 21628.

It is an arithmetic number, because the mean of its divisors is an integer number (16162920).

Almost surely, 2^165093691 is an apocalyptic number.

165093691 is a deficient number, since it is larger than the sum of its proper divisors (28861349).

165093691 is a wasteful number, since it uses less digits than its factorization.

165093691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33474 (or 33467 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 165093691 is about 12848.8789783389. The cubic root of 165093691 is about 548.5844491377.

The spelling of 165093691 in words is "one hundred sixty-five million, ninety-three thousand, six hundred ninety-one".