243965972 has 12 divisors (see below), whose sum is σ = 428306676. Its totient is φ = 121592640.

The previous prime is 243965971. The next prime is 243965977. The reversal of 243965972 is 279569342.

It can be written as a sum of positive squares in 2 ways, for example, as 6990736 + 236975236 = 2644^2 + 15394^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243965971) 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, 96179 + ... + 98682.

It is an arithmetic number, because the mean of its divisors is an integer number (35692223).

Almost surely, 2^243965972 is an apocalyptic number.

It is an amenable number.

243965972 is a deficient number, since it is larger than the sum of its proper divisors (184340704).

243965972 is a wasteful number, since it uses less digits than its factorization.

243965972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195178 (or 195176 counting only the distinct ones).

The product of its digits is 816480, while the sum is 47.

The square root of 243965972 is about 15619.4101040980. The cubic root of 243965972 is about 624.8509272199.

The spelling of 243965972 in words is "two hundred forty-three million, nine hundred sixty-five thousand, nine hundred seventy-two".