169856393 has 12 divisors (see below), whose sum is σ = 204403140. Its totient is φ = 140569632.

The previous prime is 169856383. The next prime is 169856431. The reversal of 169856393 is 393658961.

It can be written as a sum of positive squares in 2 ways, for example, as 83960569 + 85895824 = 9163^2 + 9268^2 .

It is not a de Polignac number, because 169856393 - 2⁶ = 169856329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (169856363) 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, 58346 + ... + 61187.

It is an arithmetic number, because the mean of its divisors is an integer number (17033595).

Almost surely, 2^169856393 is an apocalyptic number.

It is an amenable number.

169856393 is a deficient number, since it is larger than the sum of its proper divisors (34546747).

169856393 is a wasteful number, since it uses less digits than its factorization.

169856393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119576 (or 119569 counting only the distinct ones).

The product of its digits is 1049760, while the sum is 50.

The square root of 169856393 is about 13032.8965698344. The cubic root of 169856393 is about 553.8097947310.

The spelling of 169856393 in words is "one hundred sixty-nine million, eight hundred fifty-six thousand, three hundred ninety-three".