873089509 has 4 divisors (see below), whose sum is σ = 875106316. Its totient is φ = 871072704.

The previous prime is 873089507. The next prime is 873089543. The reversal of 873089509 is 905980378.

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

It can be written as a sum of positive squares in 2 ways, for example, as 386004609 + 487084900 = 19647^2 + 22070^2 .

It is a cyclic number.

It is not a de Polignac number, because 873089509 - 2¹ = 873089507 is a prime.

It is a super-2 number, since 2×873089509² = 1524570581451722162, which 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 (873089507) 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 3 ways as a sum of consecutive naturals, for example, 1007754 + ... + 1008619.

It is an arithmetic number, because the mean of its divisors is an integer number (218776579).

Almost surely, 2^873089509 is an apocalyptic number.

It is an amenable number.

873089509 is a deficient number, since it is larger than the sum of its proper divisors (2016807).

873089509 is a wasteful number, since it uses less digits than its factorization.

873089509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2016806.

The product of its (nonzero) digits is 544320, while the sum is 49.

The square root of 873089509 is about 29548.0880768959. The cubic root of 873089509 is about 955.7689626420.

The spelling of 873089509 in words is "eight hundred seventy-three million, eighty-nine thousand, five hundred nine".