163749145 has 8 divisors (see below), whose sum is σ = 224570304. Its totient is φ = 112285104.

The previous prime is 163749143. The next prime is 163749169. The reversal of 163749145 is 541947361.

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

It is a cyclic number.

It is not a de Polignac number, because 163749145 - 2¹ = 163749143 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 163749098 and 163749107.

It is not an unprimeable number, because it can be changed into a prime (163749143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2339239 + ... + 2339308.

It is an arithmetic number, because the mean of its divisors is an integer number (28071288).

Almost surely, 2^163749145 is an apocalyptic number.

It is an amenable number.

163749145 is a deficient number, since it is larger than the sum of its proper divisors (60821159).

163749145 is an equidigital number, since it uses as much as digits as its factorization.

163749145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4678559.

The product of its digits is 90720, while the sum is 40.

The square root of 163749145 is about 12796.4504844117. The cubic root of 163749145 is about 547.0911384893.

The spelling of 163749145 in words is "one hundred sixty-three million, seven hundred forty-nine thousand, one hundred forty-five".