87990837807 has 4 divisors (see below), whose sum is σ = 117321117080. Its totient is φ = 58660558536.

The previous prime is 87990837797. The next prime is 87990837827. The reversal of 87990837807 is 70873809978.

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

It is not a de Polignac number, because 87990837807 - 2⁴ = 87990837791 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 (87990837827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14665139632 + ... + 14665139637.

It is an arithmetic number, because the mean of its divisors is an integer number (29330279270).

Almost surely, 2^87990837807 is an apocalyptic number.

87990837807 is a deficient number, since it is larger than the sum of its proper divisors (29330279273).

87990837807 is a wasteful number, since it uses less digits than its factorization.

87990837807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29330279272.

The product of its (nonzero) digits is 42674688, while the sum is 66.

The spelling of 87990837807 in words is "eighty-seven billion, nine hundred ninety million, eight hundred thirty-seven thousand, eight hundred seven".