243687650 has 12 divisors (see below), whose sum is σ = 453259122. Its totient is φ = 97475040.

The previous prime is 243687623. The next prime is 243687659. The reversal of 243687650 is 56786342.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 205951201 + 37736449 = 14351^2 + 6143^2 .

It is a junction number, because it is equal to n+sod(n) for n = 243687598 and 243687607.

It is not an unprimeable number, because it can be changed into a prime (243687659) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2436827 + ... + 2436926.

Almost surely, 2^243687650 is an apocalyptic number.

243687650 is a deficient number, since it is larger than the sum of its proper divisors (209571472).

243687650 is a wasteful number, since it uses less digits than its factorization.

243687650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4873765 (or 4873760 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 41.

The square root of 243687650 is about 15610.4980702090. The cubic root of 243687650 is about 624.6132220272.

The spelling of 243687650 in words is "two hundred forty-three million, six hundred eighty-seven thousand, six hundred fifty".