809499051 has 12 divisors (see below), whose sum is σ = 1191338928. Its totient is φ = 529483344.

The previous prime is 809499049. The next prime is 809499059. The reversal of 809499051 is 150994908.

It is not a de Polignac number, because 809499051 - 2¹ = 809499049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 809498988 and 809499006.

It is not an unprimeable number, because it can be changed into a prime (809499059) 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 11 ways as a sum of consecutive naturals, for example, 848055 + ... + 849008.

It is an arithmetic number, because the mean of its divisors is an integer number (99278244).

Almost surely, 2^809499051 is an apocalyptic number.

809499051 is a deficient number, since it is larger than the sum of its proper divisors (381839877).

809499051 is a wasteful number, since it uses less digits than its factorization.

809499051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1697122 (or 1697119 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 809499051 is about 28451.6968035300. The cubic root of 809499051 is about 931.9775436361.

It can be divided in two parts, 80949 and 9051, that added together give a square (90000 = 300²).

The spelling of 809499051 in words is "eight hundred nine million, four hundred ninety-nine thousand, fifty-one".