797955809 has 8 divisors (see below), whose sum is σ = 965593728. Its totient is φ = 643728960.

The previous prime is 797955731. The next prime is 797955811. The reversal of 797955809 is 908559797.

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

It is a de Polignac number, because none of the positive numbers 2^k-797955809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (797955869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3352637 + ... + 3352874.

It is an arithmetic number, because the mean of its divisors is an integer number (120699216).

Almost surely, 2^797955809 is an apocalyptic number.

It is an amenable number.

797955809 is a deficient number, since it is larger than the sum of its proper divisors (167637919).

797955809 is a wasteful number, since it uses less digits than its factorization.

797955809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6705535.

The product of its (nonzero) digits is 7144200, while the sum is 59.

The square root of 797955809 is about 28248.1116006008. Note that the first 3 decimals coincide. The cubic root of 797955809 is about 927.5264011200.

The spelling of 797955809 in words is "seven hundred ninety-seven million, nine hundred fifty-five thousand, eight hundred nine".