243694069 has 4 divisors (see below), whose sum is σ = 251555200. Its totient is φ = 235832940.

The previous prime is 243694063. The next prime is 243694097. The reversal of 243694069 is 960496342.

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.

It is a cyclic number.

It is not a de Polignac number, because 243694069 - 2¹⁹ = 243169781 is a prime.

It is a super-2 number, since 2×243694069² = 118773598531553522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243694063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3930519 + ... + 3930580.

It is an arithmetic number, because the mean of its divisors is an integer number (62888800).

Almost surely, 2^243694069 is an apocalyptic number.

It is an amenable number.

243694069 is a deficient number, since it is larger than the sum of its proper divisors (7861131).

243694069 is an equidigital number, since it uses as much as digits as its factorization.

243694069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7861130.

The product of its (nonzero) digits is 279936, while the sum is 43.

The square root of 243694069 is about 15610.7036676762. The cubic root of 243694069 is about 624.6187063115.

The spelling of 243694069 in words is "two hundred forty-three million, six hundred ninety-four thousand, sixty-nine".