163755091 has 4 divisors (see below), whose sum is σ = 172373800. Its totient is φ = 155136384.

The previous prime is 163755089. The next prime is 163755131. The reversal of 163755091 is 190557361.

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

It is a cyclic number.

It is not a de Polignac number, because 163755091 - 2¹ = 163755089 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 163755091.

It is not an unprimeable number, because it can be changed into a prime (163755061) 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, 4309326 + ... + 4309363.

It is an arithmetic number, because the mean of its divisors is an integer number (43093450).

Almost surely, 2^163755091 is an apocalyptic number.

163755091 is a deficient number, since it is larger than the sum of its proper divisors (8618709).

163755091 is an equidigital number, since it uses as much as digits as its factorization.

163755091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8618708.

The product of its (nonzero) digits is 28350, while the sum is 37.

The square root of 163755091 is about 12796.6828123541. The cubic root of 163755091 is about 547.0977603346.

The spelling of 163755091 in words is "one hundred sixty-three million, seven hundred fifty-five thousand, ninety-one".