163301681 has 2 divisors, whose sum is σ = 163301682. Its totient is φ = 163301680.

The previous prime is 163301653. The next prime is 163301687. The reversal of 163301681 is 186103361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105678400 + 57623281 = 10280^2 + 7591^2 .

It is a cyclic number.

It is not a de Polignac number, because 163301681 - 2⁶ = 163301617 is a prime.

It is a super-2 number, since 2×163301681² = 53334878034851522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (163301687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81650840 + 81650841.

It is an arithmetic number, because the mean of its divisors is an integer number (81650841).

Almost surely, 2^163301681 is an apocalyptic number.

It is an amenable number.

163301681 is a deficient number, since it is larger than the sum of its proper divisors (1).

163301681 is an equidigital number, since it uses as much as digits as its factorization.

163301681 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 29.

The square root of 163301681 is about 12778.9546129564. The cubic root of 163301681 is about 546.5923533642.

The spelling of 163301681 in words is "one hundred sixty-three million, three hundred one thousand, six hundred eighty-one".