87087578979 has 4 divisors (see below), whose sum is σ = 116116771976. Its totient is φ = 58058385984.

The previous prime is 87087578959. The next prime is 87087578989. The reversal of 87087578979 is 97987578078.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 87087578979 - 2⁹ = 87087578467 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87087578979.

It is not an unprimeable number, because it can be changed into a prime (87087578959) 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, 14514596494 + ... + 14514596499.

It is an arithmetic number, because the mean of its divisors is an integer number (29029192994).

Almost surely, 2^87087578979 is an apocalyptic number.

87087578979 is a deficient number, since it is larger than the sum of its proper divisors (29029192997).

87087578979 is a wasteful number, since it uses less digits than its factorization.

87087578979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29029192996.

The product of its (nonzero) digits is 497871360, while the sum is 75.

The spelling of 87087578979 in words is "eighty-seven billion, eighty-seven million, five hundred seventy-eight thousand, nine hundred seventy-nine".