243670445 has 8 divisors (see below), whose sum is σ = 292648344. Its totient is φ = 194773824.

The previous prime is 243670439. The next prime is 243670451. The reversal of 243670445 is 544076342.

It is an interprime number because it is at equal distance from previous prime (243670439) and next prime (243670451).

It can be written as a sum of positive squares in 4 ways, for example, as 71588521 + 172081924 = 8461^2 + 13118^2 .

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-243670445 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13514 + ... + 25883.

It is an arithmetic number, because the mean of its divisors is an integer number (36581043).

Almost surely, 2^243670445 is an apocalyptic number.

It is an amenable number.

243670445 is a deficient number, since it is larger than the sum of its proper divisors (48977899).

243670445 is a wasteful number, since it uses less digits than its factorization.

243670445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40639.

The product of its (nonzero) digits is 80640, while the sum is 35.

The square root of 243670445 is about 15609.9469890195. The cubic root of 243670445 is about 624.5985218931.

The spelling of 243670445 in words is "two hundred forty-three million, six hundred seventy thousand, four hundred forty-five".