243263249 has 4 divisors (see below), whose sum is σ = 253839936. Its totient is φ = 232686564.

The previous prime is 243263227. The next prime is 243263263. The reversal of 243263249 is 942362342.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 243263249 - 2¹² = 243259153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243263219) 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, 5288309 + ... + 5288354.

It is an arithmetic number, because the mean of its divisors is an integer number (63459984).

Almost surely, 2^243263249 is an apocalyptic number.

It is an amenable number.

243263249 is a deficient number, since it is larger than the sum of its proper divisors (10576687).

243263249 is a wasteful number, since it uses less digits than its factorization.

243263249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10576686.

The product of its digits is 62208, while the sum is 35.

The square root of 243263249 is about 15596.8986981387. The cubic root of 243263249 is about 624.2504071496.

The spelling of 243263249 in words is "two hundred forty-three million, two hundred sixty-three thousand, two hundred forty-nine".