163243745 has 12 divisors (see below), whose sum is σ = 227875284. Its totient is φ = 111938400.

The previous prime is 163243727. The next prime is 163243771. The reversal of 163243745 is 547342361.

It can be written as a sum of positive squares in 2 ways, for example, as 113060689 + 50183056 = 10633^2 + 7084^2 .

It is not a de Polignac number, because 163243745 - 2⁶ = 163243681 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 332906 + ... + 333395.

It is an arithmetic number, because the mean of its divisors is an integer number (18989607).

Almost surely, 2^163243745 is an apocalyptic number.

It is an amenable number.

163243745 is a deficient number, since it is larger than the sum of its proper divisors (64631539).

163243745 is an equidigital number, since it uses as much as digits as its factorization.

163243745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666320 (or 666313 counting only the distinct ones).

The product of its digits is 60480, while the sum is 35.

The square root of 163243745 is about 12776.6875597707. The cubic root of 163243745 is about 546.5277058968.

The spelling of 163243745 in words is "one hundred sixty-three million, two hundred forty-three thousand, seven hundred forty-five".