163786541 has 2 divisors, whose sum is σ = 163786542. Its totient is φ = 163786540.

The previous prime is 163786507. The next prime is 163786573. The reversal of 163786541 is 145687361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131010916 + 32775625 = 11446^2 + 5725^2 .

It is an emirp because it is prime and its reverse (145687361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 163786541 - 2¹⁴ = 163770157 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163786591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81893270 + 81893271.

It is an arithmetic number, because the mean of its divisors is an integer number (81893271).

Almost surely, 2^163786541 is an apocalyptic number.

It is an amenable number.

163786541 is a deficient number, since it is larger than the sum of its proper divisors (1).

163786541 is an equidigital number, since it uses as much as digits as its factorization.

163786541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 41.

The square root of 163786541 is about 12797.9115874427. The cubic root of 163786541 is about 547.1327823973.

The spelling of 163786541 in words is "one hundred sixty-three million, seven hundred eighty-six thousand, five hundred forty-one".