809349243 has 16 divisors (see below), whose sum is σ = 1143567360. Its totient is φ = 507401856.

The previous prime is 809349239. The next prime is 809349253. The reversal of 809349243 is 342943908.

It is a happy number.

It is not a de Polignac number, because 809349243 - 2² = 809349239 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 809349195 and 809349204.

It is not an unprimeable number, because it can be changed into a prime (809349253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61698 + ... + 73656.

It is an arithmetic number, because the mean of its divisors is an integer number (71472960).

Almost surely, 2^809349243 is an apocalyptic number.

809349243 is a deficient number, since it is larger than the sum of its proper divisors (334218117).

809349243 is a wasteful number, since it uses less digits than its factorization.

809349243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13306.

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 809349243 is about 28449.0640092078. The cubic root of 809349243 is about 931.9200486931.

The spelling of 809349243 in words is "eight hundred nine million, three hundred forty-nine thousand, two hundred forty-three".