163003681 has 2 divisors, whose sum is σ = 163003682. Its totient is φ = 163003680.

The previous prime is 163003663. The next prime is 163003703. The reversal of 163003681 is 186300361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 162792081 + 211600 = 12759^2 + 460^2 .

It is a cyclic number.

It is not a de Polignac number, because 163003681 - 2¹⁷ = 162872609 is a prime.

It is a super-2 number, since 2×163003681² = 53140400039099522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (163003601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81501840 + 81501841.

It is an arithmetic number, because the mean of its divisors is an integer number (81501841).

Almost surely, 2^163003681 is an apocalyptic number.

It is an amenable number.

163003681 is a deficient number, since it is larger than the sum of its proper divisors (1).

163003681 is an equidigital number, since it uses as much as digits as its factorization.

163003681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 163003681 is about 12767.2894930757. The cubic root of 163003681 is about 546.2596690945.

The spelling of 163003681 in words is "one hundred sixty-three million, three thousand, six hundred eighty-one".