243027747689 has 4 divisors (see below), whose sum is σ = 243323762820. Its totient is φ = 242731732560.

The previous prime is 243027747629. The next prime is 243027747701. The reversal of 243027747689 is 986747720342.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 48458537689 + 194569210000 = 220133^2 + 441100^2 .

It is a cyclic number.

It is not a de Polignac number, because 243027747689 - 2¹² = 243027743593 is a prime.

It is a super-2 number, since 2×243027747689² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243027747619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148006334 + ... + 148007975.

It is an arithmetic number, because the mean of its divisors is an integer number (60830940705).

Almost surely, 2^243027747689 is an apocalyptic number.

It is an amenable number.

243027747689 is a deficient number, since it is larger than the sum of its proper divisors (296015131).

243027747689 is an equidigital number, since it uses as much as digits as its factorization.

243027747689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296015130.

The product of its (nonzero) digits is 28449792, while the sum is 59.

The spelling of 243027747689 in words is "two hundred forty-three billion, twenty-seven million, seven hundred forty-seven thousand, six hundred eighty-nine".