243741899 has 8 divisors (see below), whose sum is σ = 257725440. Its totient is φ = 229873896.

The previous prime is 243741863. The next prime is 243741917. The reversal of 243741899 is 998147342.

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-243741899 is a prime.

It is a super-2 number, since 2×243741899² = 118820226656252402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243711899) 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, 24527 + ... + 33000.

It is an arithmetic number, because the mean of its divisors is an integer number (32215680).

Almost surely, 2^243741899 is an apocalyptic number.

243741899 is a deficient number, since it is larger than the sum of its proper divisors (13983541).

243741899 is a wasteful number, since it uses less digits than its factorization.

243741899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57769.

The product of its digits is 435456, while the sum is 47.

The square root of 243741899 is about 15612.2355542056. The cubic root of 243741899 is about 624.6595684171.

The spelling of 243741899 in words is "two hundred forty-three million, seven hundred forty-one thousand, eight hundred ninety-nine".