87233309 has 4 divisors (see below), whose sum is σ = 89591004. Its totient is φ = 84875616.

The previous prime is 87233299. The next prime is 87233357. The reversal of 87233309 is 90333278.

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 39967684 + 47265625 = 6322^2 + 6875^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87233309 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 (87230309) 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, 1178792 + ... + 1178865.

It is an arithmetic number, because the mean of its divisors is an integer number (22397751).

Almost surely, 2^87233309 is an apocalyptic number.

It is an amenable number.

87233309 is a deficient number, since it is larger than the sum of its proper divisors (2357695).

87233309 is a wasteful number, since it uses less digits than its factorization.

87233309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2357694.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 87233309 is about 9339.8773546551. The cubic root of 87233309 is about 443.5005018409.

The spelling of 87233309 in words is "eighty-seven million, two hundred thirty-three thousand, three hundred nine".