163749733 has 8 divisors (see below), whose sum is σ = 196992320. Its totient is φ = 132969600.

The previous prime is 163749713. The next prime is 163749757. The reversal of 163749733 is 337947361.

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

It is not a de Polignac number, because 163749733 - 2⁹ = 163749221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 163749733.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163749713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 615468 + ... + 615733.

It is an arithmetic number, because the mean of its divisors is an integer number (24624040).

Almost surely, 2^163749733 is an apocalyptic number.

It is an amenable number.

163749733 is a deficient number, since it is larger than the sum of its proper divisors (33242587).

163749733 is a wasteful number, since it uses less digits than its factorization.

163749733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231227.

The product of its digits is 285768, while the sum is 43.

The square root of 163749733 is about 12796.4734595122. The cubic root of 163749733 is about 547.0917933308.

The spelling of 163749733 in words is "one hundred sixty-three million, seven hundred forty-nine thousand, seven hundred thirty-three".