243276491909 has 8 divisors (see below), whose sum is σ = 281003862528. Its totient is φ = 208151008960.

The previous prime is 243276491851. The next prime is 243276491989. The reversal of 243276491909 is 909194672342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243276491909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243276491989) 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, 650471717 + ... + 650472090.

It is an arithmetic number, because the mean of its divisors is an integer number (35125482816).

Almost surely, 2^243276491909 is an apocalyptic number.

It is an amenable number.

243276491909 is a deficient number, since it is larger than the sum of its proper divisors (37727370619).

243276491909 is a wasteful number, since it uses less digits than its factorization.

243276491909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1300943835.

The product of its (nonzero) digits is 5878656, while the sum is 56.

The spelling of 243276491909 in words is "two hundred forty-three billion, two hundred seventy-six million, four hundred ninety-one thousand, nine hundred nine".