163353961 has 3 divisors (see below), whose sum is σ = 163366743. Its totient is φ = 163341180.

The previous prime is 163353959. The next prime is 163353979. The reversal of 163353961 is 169353361.

The square root of 163353961 is 12781.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 120582361 + 42771600 = 10981^2 + 6540^2 .

It is not a de Polignac number, because 163353961 - 2¹ = 163353959 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 163353961.

It is not an unprimeable number, because it can be changed into a prime (163353661) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 6391 + ... + 19171.

It is an arithmetic number, because the mean of its divisors is an integer number (54455581).

Almost surely, 2^163353961 is an apocalyptic number.

163353961 is the 12781-st square number.

163353961 is the 6391-st centered octagonal number.

It is an amenable number.

163353961 is a deficient number, since it is larger than the sum of its proper divisors (12782).

163353961 is an frugal number, since it uses more digits than its factorization.

163353961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25562 (or 12781 counting only the distinct ones).

The product of its digits is 43740, while the sum is 37.

The cubic root of 163353961 is about 546.6506765020.

The spelling of 163353961 in words is "one hundred sixty-three million, three hundred fifty-three thousand, nine hundred sixty-one".