163354621 has 4 divisors (see below), whose sum is σ = 164201212. Its totient is φ = 162508032.

The previous prime is 163354613. The next prime is 163354637. The reversal of 163354621 is 126453361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 126453361 = 17 ⋅7438433.

It can be written as a sum of positive squares in 2 ways, for example, as 90440100 + 72914521 = 9510^2 + 8539^2 .

It is a cyclic number.

It is not a de Polignac number, because 163354621 - 2³ = 163354613 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 (163354661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 423006 + ... + 423391.

It is an arithmetic number, because the mean of its divisors is an integer number (41050303).

Almost surely, 2^163354621 is an apocalyptic number.

It is an amenable number.

163354621 is a deficient number, since it is larger than the sum of its proper divisors (846591).

163354621 is an equidigital number, since it uses as much as digits as its factorization.

163354621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 846590.

The product of its digits is 12960, while the sum is 31.

The square root of 163354621 is about 12781.0258195499. The cubic root of 163354621 is about 546.6514127130.

The spelling of 163354621 in words is "one hundred sixty-three million, three hundred fifty-four thousand, six hundred twenty-one".