16394165 has 4 divisors (see below), whose sum is σ = 19673004. Its totient is φ = 13115328.

The previous prime is 16394149. The next prime is 16394173. The reversal of 16394165 is 56149361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56149361 = 113 ⋅496897.

It can be written as a sum of positive squares in 2 ways, for example, as 10278436 + 6115729 = 3206^2 + 2473^2 .

It is a cyclic number.

It is not a de Polignac number, because 16394165 - 2⁴ = 16394149 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 1639412 + ... + 1639421.

It is an arithmetic number, because the mean of its divisors is an integer number (4918251).

Almost surely, 2^16394165 is an apocalyptic number.

It is an amenable number.

16394165 is a deficient number, since it is larger than the sum of its proper divisors (3278839).

16394165 is an equidigital number, since it uses as much as digits as its factorization.

16394165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3278838.

The product of its digits is 19440, while the sum is 35.

The square root of 16394165 is about 4048.9708568968. The cubic root of 16394165 is about 254.0366832752.

The spelling of 16394165 in words is "sixteen million, three hundred ninety-four thousand, one hundred sixty-five".