163994227 has 2 divisors, whose sum is σ = 163994228. Its totient is φ = 163994226.

The previous prime is 163994203. The next prime is 163994287. The reversal of 163994227 is 722499361.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163994227 is a prime.

It is not a weakly prime, because it can be changed into another prime (163994287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81997113 + 81997114.

It is an arithmetic number, because the mean of its divisors is an integer number (81997114).

Almost surely, 2^163994227 is an apocalyptic number.

163994227 is a deficient number, since it is larger than the sum of its proper divisors (1).

163994227 is an equidigital number, since it uses as much as digits as its factorization.

163994227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 43.

The square root of 163994227 is about 12806.0230751002. The cubic root of 163994227 is about 547.3639447030.

The spelling of 163994227 in words is "one hundred sixty-three million, nine hundred ninety-four thousand, two hundred twenty-seven".