163494871 has 2 divisors, whose sum is σ = 163494872. Its totient is φ = 163494870.

The previous prime is 163494857. The next prime is 163494889. The reversal of 163494871 is 178494361.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 163494871 - 2⁷ = 163494743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163494671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81747435 + 81747436.

It is an arithmetic number, because the mean of its divisors is an integer number (81747436).

Almost surely, 2^163494871 is an apocalyptic number.

163494871 is a deficient number, since it is larger than the sum of its proper divisors (1).

163494871 is an equidigital number, since it uses as much as digits as its factorization.

163494871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 43.

The square root of 163494871 is about 12786.5112912006. The cubic root of 163494871 is about 546.8078125938.

The spelling of 163494871 in words is "one hundred sixty-three million, four hundred ninety-four thousand, eight hundred seventy-one".