243773473 has 4 divisors (see below), whose sum is σ = 243805060. Its totient is φ = 243741888.

The previous prime is 243773461. The next prime is 243773503. The reversal of 243773473 is 374377342.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 61199329 + 182574144 = 7823^2 + 13512^2 .

It is a cyclic number.

It is not a de Polignac number, because 243773473 - 2⁵ = 243773441 is a prime.

It is a super-2 number, since 2×243773473² = 118851012276963458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243773773) 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, 4333 + ... + 22501.

It is an arithmetic number, because the mean of its divisors is an integer number (60951265).

Almost surely, 2^243773473 is an apocalyptic number.

It is an amenable number.

243773473 is a deficient number, since it is larger than the sum of its proper divisors (31587).

243773473 is a wasteful number, since it uses less digits than its factorization.

243773473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31586.

The product of its digits is 296352, while the sum is 40.

The square root of 243773473 is about 15613.2467155297. The cubic root of 243773473 is about 624.6865397746.

The spelling of 243773473 in words is "two hundred forty-three million, seven hundred seventy-three thousand, four hundred seventy-three".