4243097509 has 4 divisors (see below), whose sum is σ = 4849254304. Its totient is φ = 3636940716.

The previous prime is 4243097497. The next prime is 4243097533. The reversal of 4243097509 is 9057903424.

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 4243097509 - 2¹⁵ = 4243064741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4243097539) 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, 303078387 + ... + 303078400.

It is an arithmetic number, because the mean of its divisors is an integer number (1212313576).

Almost surely, 2^4243097509 is an apocalyptic number.

It is an amenable number.

4243097509 is a deficient number, since it is larger than the sum of its proper divisors (606156795).

4243097509 is an equidigital number, since it uses as much as digits as its factorization.

4243097509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606156794.

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 4243097509 is about 65139.0628501823. The cubic root of 4243097509 is about 1618.9285081656.

The spelling of 4243097509 in words is "four billion, two hundred forty-three million, ninety-seven thousand, five hundred nine".