80825009 has 4 divisors (see below), whose sum is σ = 80857716. Its totient is φ = 80792304.

The previous prime is 80824957. The next prime is 80825033. The reversal of 80825009 is 90052808.

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 9591409 + 71233600 = 3097^2 + 8440^2 .

It is a cyclic number.

It is not a de Polignac number, because 80825009 - 2¹⁶ = 80759473 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (80825039) 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, 12314 + ... + 17699.

It is an arithmetic number, because the mean of its divisors is an integer number (20214429).

Almost surely, 2^80825009 is an apocalyptic number.

It is an amenable number.

80825009 is a deficient number, since it is larger than the sum of its proper divisors (32707).

80825009 is a wasteful number, since it uses less digits than its factorization.

80825009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32706.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 80825009 is about 8990.2730214382. The cubic root of 80825009 is about 432.3630653400.

The spelling of 80825009 in words is "eighty million, eight hundred twenty-five thousand, nine".