243409465 has 8 divisors (see below), whose sum is σ = 314560008. Its totient is φ = 179748480.

The previous prime is 243409409. The next prime is 243409469. The reversal of 243409465 is 564904342.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 891136 + 242518329 = 944^2 + 15573^2 .

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

It is not a de Polignac number, because 243409465 - 2²⁷ = 109191737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243409469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1872316 + ... + 1872445.

It is an arithmetic number, because the mean of its divisors is an integer number (39320001).

Almost surely, 2^243409465 is an apocalyptic number.

It is an amenable number.

243409465 is a deficient number, since it is larger than the sum of its proper divisors (71150543).

243409465 is a wasteful number, since it uses less digits than its factorization.

243409465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3744779.

The product of its (nonzero) digits is 103680, while the sum is 37.

The square root of 243409465 is about 15601.5853361125. The cubic root of 243409465 is about 624.3754529134.

The spelling of 243409465 in words is "two hundred forty-three million, four hundred nine thousand, four hundred sixty-five".