80652809 has 4 divisors (see below), whose sum is σ = 81757716. Its totient is φ = 79547904.

The previous prime is 80652787. The next prime is 80652833. The reversal of 80652809 is 90825608.

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 42250000 + 38402809 = 6500^2 + 6197^2 .

It is a cyclic number.

It is not a de Polignac number, because 80652809 - 2²⁰ = 79604233 is a prime.

It is a super-3 number, since 3×80652809³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80652409) 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, 552344 + ... + 552489.

It is an arithmetic number, because the mean of its divisors is an integer number (20439429).

Almost surely, 2^80652809 is an apocalyptic number.

It is an amenable number.

80652809 is a deficient number, since it is larger than the sum of its proper divisors (1104907).

80652809 is a wasteful number, since it uses less digits than its factorization.

80652809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1104906.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 80652809 is about 8980.6908976982. The cubic root of 80652809 is about 432.0557930483.

The spelling of 80652809 in words is "eighty million, six hundred fifty-two thousand, eight hundred nine".