163706 has 4 divisors (see below), whose sum is σ = 245562. Its totient is φ = 81852.

The previous prime is 163697. The next prime is 163729. The reversal of 163706 is 607361.

163706 is nontrivially palindromic in base 14.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 607361 = 23 ⋅26407.

It can be written as a sum of positive squares in only one way, i.e., 105625 + 58081 = 325^2 + 241^2 .

It is a plaindrome in base 15.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 40925 + ... + 40928.

2¹⁶³⁷⁰⁶ is an apocalyptic number.

163706 is a deficient number, since it is larger than the sum of its proper divisors (81856).

163706 is an equidigital number, since it uses as much as digits as its factorization.

163706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81855.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 163706 is about 404.6059811718. The cubic root of 163706 is about 54.7043084660.

The spelling of 163706 in words is "one hundred sixty-three thousand, seven hundred six".