168273943 has 4 divisors (see below), whose sum is σ = 168311968. Its totient is φ = 168235920.

The previous prime is 168273913. The next prime is 168273953. The reversal of 168273943 is 349372861.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 168273943 - 2²⁵ = 134719511 is a prime.

It is a super-2 number, since 2×168273943² = 56632239785534498, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 168273943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168273913) 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, 11343 + ... + 21568.

It is an arithmetic number, because the mean of its divisors is an integer number (42077992).

Almost surely, 2^168273943 is an apocalyptic number.

168273943 is a deficient number, since it is larger than the sum of its proper divisors (38025).

168273943 is an equidigital number, since it uses as much as digits as its factorization.

168273943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38024.

The product of its digits is 217728, while the sum is 43.

The square root of 168273943 is about 12972.0446730652. The cubic root of 168273943 is about 552.0845882675.

It can be divided in two parts, 1682 and 73943, that added together give a square (75625 = 275²).

The spelling of 168273943 in words is "one hundred sixty-eight million, two hundred seventy-three thousand, nine hundred forty-three".