243669393 has 24 divisors (see below), whose sum is σ = 396354816. Its totient is φ = 142912800.

The previous prime is 243669389. The next prime is 243669409. The reversal of 243669393 is 393966342.

It is not a de Polignac number, because 243669393 - 2² = 243669389 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243669323) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36630 + ... + 42767.

It is an arithmetic number, because the mean of its divisors is an integer number (16514784).

Almost surely, 2^243669393 is an apocalyptic number.

It is an amenable number.

243669393 is a deficient number, since it is larger than the sum of its proper divisors (152685423).

243669393 is a wasteful number, since it uses less digits than its factorization.

243669393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79445 (or 79442 counting only the distinct ones).

The product of its digits is 629856, while the sum is 45.

The square root of 243669393 is about 15609.9132925202. The cubic root of 243669393 is about 624.5976230307.

The spelling of 243669393 in words is "two hundred forty-three million, six hundred sixty-nine thousand, three hundred ninety-three".