243961972 has 24 divisors (see below), whose sum is σ = 438068232. Its totient is φ = 118809600.

The previous prime is 243961969. The next prime is 243961973. The reversal of 243961972 is 279169342.

243961972 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 16434916 + 227527056 = 4054^2 + 15084^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243961973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178572 + ... + 179932.

It is an arithmetic number, because the mean of its divisors is an integer number (18252843).

Almost surely, 2^243961972 is an apocalyptic number.

It is an amenable number.

243961972 is a deficient number, since it is larger than the sum of its proper divisors (194106260).

243961972 is a wasteful number, since it uses less digits than its factorization.

243961972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2499 (or 2497 counting only the distinct ones).

The product of its digits is 163296, while the sum is 43.

The square root of 243961972 is about 15619.2820577644. The cubic root of 243961972 is about 624.8475122390.

The spelling of 243961972 in words is "two hundred forty-three million, nine hundred sixty-one thousand, nine hundred seventy-two".