163205653 has 4 divisors (see below), whose sum is σ = 175759948. Its totient is φ = 150651360.

The previous prime is 163205629. The next prime is 163205657. The reversal of 163205653 is 356502361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 356502361 = 61 ⋅5844301.

It can be written as a sum of positive squares in 2 ways, for example, as 83942244 + 79263409 = 9162^2 + 8903^2 .

It is a cyclic number.

It is not a de Polignac number, because 163205653 - 2⁵ = 163205621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163205657) 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, 6277128 + ... + 6277153.

It is an arithmetic number, because the mean of its divisors is an integer number (43939987).

Almost surely, 2^163205653 is an apocalyptic number.

163205653 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

163205653 is a deficient number, since it is larger than the sum of its proper divisors (12554295).

163205653 is a wasteful number, since it uses less digits than its factorization.

163205653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12554294.

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 163205653 is about 12775.1967890910. The cubic root of 163205653 is about 546.4851928787.

The spelling of 163205653 in words is "one hundred sixty-three million, two hundred five thousand, six hundred fifty-three".