87079809 has 4 divisors (see below), whose sum is σ = 116106416. Its totient is φ = 58053204.

The previous prime is 87079801. The next prime is 87079819. The reversal of 87079809 is 90897078.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 87079809 - 2³ = 87079801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87079801) 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, 14513299 + ... + 14513304.

It is an arithmetic number, because the mean of its divisors is an integer number (29026604).

Almost surely, 2^87079809 is an apocalyptic number.

It is an amenable number.

87079809 is a deficient number, since it is larger than the sum of its proper divisors (29026607).

87079809 is a wasteful number, since it uses less digits than its factorization.

87079809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29026606.

The product of its (nonzero) digits is 254016, while the sum is 48.

The square root of 87079809 is about 9331.6562838544. The cubic root of 87079809 is about 443.2402140463.

The spelling of 87079809 in words is "eighty-seven million, seventy-nine thousand, eight hundred nine".