163952641 has 4 divisors (see below), whose sum is σ = 173596932. Its totient is φ = 154308352.

The previous prime is 163952623. The next prime is 163952647. The reversal of 163952641 is 146259361.

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 77369616 + 86583025 = 8796^2 + 9305^2 .

It is a cyclic number.

It is not a de Polignac number, because 163952641 - 2¹¹ = 163950593 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 163952641.

It is not an unprimeable number, because it can be changed into a prime (163952647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4822120 + ... + 4822153.

It is an arithmetic number, because the mean of its divisors is an integer number (43399233).

Almost surely, 2^163952641 is an apocalyptic number.

It is an amenable number.

163952641 is a deficient number, since it is larger than the sum of its proper divisors (9644291).

163952641 is an equidigital number, since it uses as much as digits as its factorization.

163952641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9644290.

The product of its digits is 38880, while the sum is 37.

The square root of 163952641 is about 12804.3992830589. The cubic root of 163952641 is about 547.3176735593.

The spelling of 163952641 in words is "one hundred sixty-three million, nine hundred fifty-two thousand, six hundred forty-one".