163000891 has 2 divisors, whose sum is σ = 163000892. Its totient is φ = 163000890.

The previous prime is 163000853. The next prime is 163000933. The reversal of 163000891 is 198000361.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 163000891 - 2¹⁵ = 162968123 is a prime.

It is equal to p_9133192 and since 163000891 and 9133192 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (163000091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81500445 + 81500446.

It is an arithmetic number, because the mean of its divisors is an integer number (81500446).

Almost surely, 2^163000891 is an apocalyptic number.

163000891 is a deficient number, since it is larger than the sum of its proper divisors (1).

163000891 is an equidigital number, since it uses as much as digits as its factorization.

163000891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 163000891 is about 12767.1802290091. The cubic root of 163000891 is about 546.2565524509.

The spelling of 163000891 in words is "one hundred sixty-three million, eight hundred ninety-one", and thus it is an aban number.