163643042 has 4 divisors (see below), whose sum is σ = 245464566. Its totient is φ = 81821520.

The previous prime is 163643033. The next prime is 163643063. The reversal of 163643042 is 240346361.

163643042 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 89321401 + 74321641 = 9451^2 + 8621^2 .

It is a junction number, because it is equal to n+sod(n) for n = 163642996 and 163643014.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40910759 + ... + 40910762.

Almost surely, 2^163643042 is an apocalyptic number.

163643042 is a deficient number, since it is larger than the sum of its proper divisors (81821524).

163643042 is an equidigital number, since it uses as much as digits as its factorization.

163643042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81821523.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 163643042 is about 12792.3040145237. The cubic root of 163643042 is about 546.9729484509.

The spelling of 163643042 in words is "one hundred sixty-three million, six hundred forty-three thousand, forty-two".