814959909 has 12 divisors (see below), whose sum is σ = 1177742956. Its totient is φ = 543039552.

The previous prime is 814959907. The next prime is 814959947. The reversal of 814959909 is 909959418.

814959909 is a `hidden beast` number, since 8 + 1 + 49 + 599 + 0 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 41563809 + 773396100 = 6447^2 + 27810^2 .

It is not a de Polignac number, because 814959909 - 2¹ = 814959907 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (814959907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1954 + ... + 40419.

Almost surely, 2^814959909 is an apocalyptic number.

It is an amenable number.

814959909 is a deficient number, since it is larger than the sum of its proper divisors (362783047).

814959909 is a wasteful number, since it uses less digits than its factorization.

814959909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44516 (or 44513 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 54.

The square root of 814959909 is about 28547.5026753655. The cubic root of 814959909 is about 934.0685468754.

The spelling of 814959909 in words is "eight hundred fourteen million, nine hundred fifty-nine thousand, nine hundred nine".