163940273 has 4 divisors (see below), whose sum is σ = 187360320. Its totient is φ = 140520228.

The previous prime is 163940269. The next prime is 163940279. The reversal of 163940273 is 372049361.

163940273 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 372049361 = 4447 ⋅83663.

It is a cyclic number.

It is not a de Polignac number, because 163940273 - 2² = 163940269 is a prime.

It is a super-2 number, since 2×163940273² = 53752826222629058, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (163940279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11710013 + ... + 11710026.

It is an arithmetic number, because the mean of its divisors is an integer number (46840080).

Almost surely, 2^163940273 is an apocalyptic number.

It is an amenable number.

163940273 is a deficient number, since it is larger than the sum of its proper divisors (23420047).

163940273 is an equidigital number, since it uses as much as digits as its factorization.

163940273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23420046.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 163940273 is about 12803.9163149405. The cubic root of 163940273 is about 547.3039106515.

The spelling of 163940273 in words is "one hundred sixty-three million, nine hundred forty thousand, two hundred seventy-three".