806887109 has 4 divisors (see below), whose sum is σ = 922156704. Its totient is φ = 691617516.

The previous prime is 806887087. The next prime is 806887121. The reversal of 806887109 is 901788608.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-806887109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (806887409) 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, 57634787 + ... + 57634800.

It is an arithmetic number, because the mean of its divisors is an integer number (230539176).

Almost surely, 2^806887109 is an apocalyptic number.

It is an amenable number.

806887109 is a deficient number, since it is larger than the sum of its proper divisors (115269595).

806887109 is a wasteful number, since it uses less digits than its factorization.

806887109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115269594.

The product of its (nonzero) digits is 193536, while the sum is 47.

The square root of 806887109 is about 28405.7583774840. The cubic root of 806887109 is about 930.9740859454.

The spelling of 806887109 in words is "eight hundred six million, eight hundred eighty-seven thousand, one hundred nine".