809514309 has 4 divisors (see below), whose sum is σ = 1079352416. Its totient is φ = 539676204.

The previous prime is 809514257. The next prime is 809514319. The reversal of 809514309 is 903415908.

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 not a de Polignac number, because 809514309 - 2⁸ = 809514053 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 (809514319) 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, 134919049 + ... + 134919054.

It is an arithmetic number, because the mean of its divisors is an integer number (269838104).

Almost surely, 2^809514309 is an apocalyptic number.

It is an amenable number.

809514309 is a deficient number, since it is larger than the sum of its proper divisors (269838107).

809514309 is a wasteful number, since it uses less digits than its factorization.

809514309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269838106.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 809514309 is about 28451.9649409316. The cubic root of 809514309 is about 931.9833991192.

The spelling of 809514309 in words is "eight hundred nine million, five hundred fourteen thousand, three hundred nine".