163484981 has 16 divisors (see below), whose sum is σ = 184187520. Its totient is φ = 143801280.

The previous prime is 163484969. The next prime is 163485013. The reversal of 163484981 is 189484361.

It is a cyclic number.

It is not a de Polignac number, because 163484981 - 2¹⁸ = 163222837 is a prime.

It is a super-2 number, since 2×163484981² = 53454678025140722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163487981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79160 + ... + 81198.

It is an arithmetic number, because the mean of its divisors is an integer number (11511720).

Almost surely, 2^163484981 is an apocalyptic number.

163484981 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

163484981 is a deficient number, since it is larger than the sum of its proper divisors (20702539).

163484981 is a wasteful number, since it uses less digits than its factorization.

163484981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2284.

The product of its digits is 165888, while the sum is 44.

The square root of 163484981 is about 12786.1245496828. The cubic root of 163484981 is about 546.7967866856.

The spelling of 163484981 in words is "one hundred sixty-three million, four hundred eighty-four thousand, nine hundred eighty-one".