163942705 has 8 divisors (see below), whose sum is σ = 196888104. Its totient is φ = 131049600.

The previous prime is 163942673. The next prime is 163942739. The reversal of 163942705 is 507249361.

It can be written as a sum of positive squares in 4 ways, for example, as 21307456 + 142635249 = 4616^2 + 11943^2 .

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

It is not a de Polignac number, because 163942705 - 2⁵ = 163942673 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5806 + ... + 19015.

It is an arithmetic number, because the mean of its divisors is an integer number (24611013).

Almost surely, 2^163942705 is an apocalyptic number.

It is an amenable number.

163942705 is a deficient number, since it is larger than the sum of its proper divisors (32945399).

163942705 is a wasteful number, since it uses less digits than its factorization.

163942705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26147.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 163942705 is about 12804.0112855308. The cubic root of 163942705 is about 547.3066169960.

It can be divided in two parts, 1639 and 42705, that added together give a palindrome (44344).

The spelling of 163942705 in words is "one hundred sixty-three million, nine hundred forty-two thousand, seven hundred five".