243693764 has 12 divisors (see below), whose sum is σ = 426677244. Its totient is φ = 121785984.

The previous prime is 243693761. The next prime is 243693767. The reversal of 243693764 is 467396342.

It is an interprime number because it is at equal distance from previous prime (243693761) and next prime (243693767).

It can be written as a sum of positive squares in 2 ways, for example, as 20430400 + 223263364 = 4520^2 + 14942^2 .

It is a super-2 number, since 2×243693764² = 118773301224975392, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (243693761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5537 + ... + 22760.

It is an arithmetic number, because the mean of its divisors is an integer number (35556437).

Almost surely, 2^243693764 is an apocalyptic number.

It is an amenable number.

243693764 is a deficient number, since it is larger than the sum of its proper divisors (182983480).

243693764 is a wasteful number, since it uses less digits than its factorization.

243693764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30454 (or 30452 counting only the distinct ones).

The product of its digits is 653184, while the sum is 44.

The square root of 243693764 is about 15610.6938987349. The cubic root of 243693764 is about 624.6184457269.

The spelling of 243693764 in words is "two hundred forty-three million, six hundred ninety-three thousand, seven hundred sixty-four".