806920987799 has 4 divisors (see below), whose sum is σ = 806924124864. Its totient is φ = 806917850736.

The previous prime is 806920987793. The next prime is 806920987849. The reversal of 806920987799 is 997789029608.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 806920987799 - 2⁴ = 806920987783 is a prime.

It is a super-2 number, since 2×806920987799² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (806920987793) 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, 1144487 + ... + 1709880.

It is an arithmetic number, because the mean of its divisors is an integer number (201731031216).

Almost surely, 2^806920987799 is an apocalyptic number.

806920987799 is a deficient number, since it is larger than the sum of its proper divisors (3137065).

806920987799 is a wasteful number, since it uses less digits than its factorization.

806920987799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3137064.

The product of its (nonzero) digits is 246903552, while the sum is 74.

The spelling of 806920987799 in words is "eight hundred six billion, nine hundred twenty million, nine hundred eighty-seven thousand, seven hundred ninety-nine".