243649012 has 6 divisors (see below), whose sum is σ = 426385778. Its totient is φ = 121824504.

The previous prime is 243648997. The next prime is 243649031. The reversal of 243649012 is 210946342.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 209496676 + 34152336 = 14474^2 + 5844^2 .

It is a super-2 number, since 2×243649012² = 118729682097152288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30456123 + ... + 30456130.

Almost surely, 2^243649012 is an apocalyptic number.

It is an amenable number.

243649012 is a deficient number, since it is larger than the sum of its proper divisors (182736766).

243649012 is a wasteful number, since it uses less digits than its factorization.

243649012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60912257 (or 60912255 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 243649012 is about 15609.2604565367. The cubic root of 243649012 is about 624.5802083431.

The spelling of 243649012 in words is "two hundred forty-three million, six hundred forty-nine thousand, twelve".