163081893 has 16 divisors (see below), whose sum is σ = 235356800. Its totient is φ = 99849024.

The previous prime is 163081879. The next prime is 163081931. The reversal of 163081893 is 398180361.

It is not a de Polignac number, because 163081893 - 2⁵ = 163081861 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163081823) 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, 2746 + ... + 18267.

It is an arithmetic number, because the mean of its divisors is an integer number (14709800).

Almost surely, 2^163081893 is an apocalyptic number.

163081893 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

163081893 is a deficient number, since it is larger than the sum of its proper divisors (72274907).

163081893 is a wasteful number, since it uses less digits than its factorization.

163081893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21228.

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 163081893 is about 12770.3521094761. The cubic root of 163081893 is about 546.3470234200.

The spelling of 163081893 in words is "one hundred sixty-three million, eighty-one thousand, eight hundred ninety-three".