809238527997 has 8 divisors (see below), whose sum is σ = 1096672978080. Its totient is φ = 530648214960.

The previous prime is 809238527969. The next prime is 809238528023. The reversal of 809238527997 is 799725832908.

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

It is not a de Polignac number, because 809238527997 - 2⁷ = 809238527869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809238527297) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2211034047 + ... + 2211034412.

It is an arithmetic number, because the mean of its divisors is an integer number (137084122260).

Almost surely, 2^809238527997 is an apocalyptic number.

It is an amenable number.

809238527997 is a deficient number, since it is larger than the sum of its proper divisors (287434450083).

809238527997 is a wasteful number, since it uses less digits than its factorization.

809238527997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4422068523.

The product of its (nonzero) digits is 137168640, while the sum is 69.

The spelling of 809238527997 in words is "eight hundred nine billion, two hundred thirty-eight million, five hundred twenty-seven thousand, nine hundred ninety-seven".