809639097 has 8 divisors (see below), whose sum is σ = 1088019456. Its totient is φ = 535509072.

The previous prime is 809639063. The next prime is 809639099. The reversal of 809639097 is 790936908.

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

It is not a de Polignac number, because 809639097 - 2⁷ = 809638969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (809639099) 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, 1062138 + ... + 1062899.

It is an arithmetic number, because the mean of its divisors is an integer number (136002432).

Almost surely, 2^809639097 is an apocalyptic number.

It is an amenable number.

809639097 is a deficient number, since it is larger than the sum of its proper divisors (278380359).

809639097 is a wasteful number, since it uses less digits than its factorization.

809639097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2125167.

The product of its (nonzero) digits is 734832, while the sum is 51.

The square root of 809639097 is about 28454.1578156866. The cubic root of 809639097 is about 932.0312855978.

The spelling of 809639097 in words is "eight hundred nine million, six hundred thirty-nine thousand, ninety-seven".