163435534393 has 2 divisors, whose sum is σ = 163435534394. Its totient is φ = 163435534392.

The previous prime is 163435534333. The next prime is 163435534397. The reversal of 163435534393 is 393435534361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 158203471504 + 5232062889 = 397748^2 + 72333^2 .

It is a cyclic number.

It is not a de Polignac number, because 163435534393 - 2²¹ = 163433437241 is a prime.

It is a super-2 number, since 2×163435534393² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (163435534397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81717767196 + 81717767197.

It is an arithmetic number, because the mean of its divisors is an integer number (81717767197).

Almost surely, 2^163435534393 is an apocalyptic number.

It is an amenable number.

163435534393 is a deficient number, since it is larger than the sum of its proper divisors (1).

163435534393 is an equidigital number, since it uses as much as digits as its factorization.

163435534393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5248800, while the sum is 49.

It can be divided in two parts, 16343 and 5534393, that added together give a square (5550736 = 2356²).

The spelling of 163435534393 in words is "one hundred sixty-three billion, four hundred thirty-five million, five hundred thirty-four thousand, three hundred ninety-three".