87723387959 has 4 divisors (see below), whose sum is σ = 87742475304. Its totient is φ = 87704300616.

The previous prime is 87723387937. The next prime is 87723387971. The reversal of 87723387959 is 95978332778.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87723387959 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 (87723387859) 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, 9536777 + ... + 9545970.

It is an arithmetic number, because the mean of its divisors is an integer number (21935618826).

Almost surely, 2^87723387959 is an apocalyptic number.

87723387959 is a deficient number, since it is larger than the sum of its proper divisors (19087345).

87723387959 is a wasteful number, since it uses less digits than its factorization.

87723387959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19087344.

The product of its digits is 160030080, while the sum is 68.

The spelling of 87723387959 in words is "eighty-seven billion, seven hundred twenty-three million, three hundred eighty-seven thousand, nine hundred fifty-nine".