873069309 has 18 divisors (see below), whose sum is σ = 1466994750. Its totient is φ = 498896496.

The previous prime is 873069283. The next prime is 873069311. The reversal of 873069309 is 903960378.

873069309 = T₄₂₂ + T₄₂₃ + ... + T₁₇₄₄.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 873025209 + 44100 = 29547^2 + 210^2 .

It is not a de Polignac number, because 873069309 - 2⁵ = 873069277 is a prime.

It is a super-3 number, since 3×873069309³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (873069809) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 989434 + ... + 990315.

Almost surely, 2^873069309 is an apocalyptic number.

It is an amenable number.

873069309 is a deficient number, since it is larger than the sum of its proper divisors (593925441).

873069309 is a wasteful number, since it uses less digits than its factorization.

873069309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1979769 (or 1979759 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 873069309 is about 29547.7462592327. The cubic root of 873069309 is about 955.7615916215.

It can be divided in two parts, 873069 and 309, that added together give a palindrome (873378).

The spelling of 873069309 in words is "eight hundred seventy-three million, sixty-nine thousand, three hundred nine".