163911061 has 4 divisors (see below), whose sum is σ = 166156492. Its totient is φ = 161665632.

The previous prime is 163911049. The next prime is 163911079. The reversal of 163911061 is 160119361.

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

It can be written as a sum of positive squares in 2 ways, for example, as 33814225 + 130096836 = 5815^2 + 11406^2 .

It is a cyclic number.

It is not a de Polignac number, because 163911061 - 2⁷ = 163910933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163971061) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 1122606 + ... + 1122751.

It is an arithmetic number, because the mean of its divisors is an integer number (41539123).

Almost surely, 2^163911061 is an apocalyptic number.

It is an amenable number.

163911061 is a deficient number, since it is larger than the sum of its proper divisors (2245431).

163911061 is an equidigital number, since it uses as much as digits as its factorization.

163911061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2245430.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 163911061 is about 12802.7755193942. The cubic root of 163911061 is about 547.2714012682.

The spelling of 163911061 in words is "one hundred sixty-three million, nine hundred eleven thousand, sixty-one".