243296993917 has 16 divisors (see below), whose sum is σ = 262832328000. Its totient is φ = 224506370304.

The previous prime is 243296993903. The next prime is 243296993957. The reversal of 243296993917 is 719399692342.

It is a cyclic number.

It is not a de Polignac number, because 243296993917 - 2²³ = 243288605309 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 (243296993957) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 873388 + ... + 1117765.

It is an arithmetic number, because the mean of its divisors is an integer number (16427020500).

Almost surely, 2^243296993917 is an apocalyptic number.

It is an amenable number.

243296993917 is a deficient number, since it is larger than the sum of its proper divisors (19535334083).

243296993917 is a wasteful number, since it uses less digits than its factorization.

243296993917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1991340.

The product of its digits is 39680928, while the sum is 64.

The spelling of 243296993917 in words is "two hundred forty-three billion, two hundred ninety-six million, nine hundred ninety-three thousand, nine hundred seventeen".