87323427089921 has 4 divisors (see below), whose sum is σ = 95261920461744. Its totient is φ = 79384933718100.

The previous prime is 87323427089891. The next prime is 87323427089939. The reversal of 87323427089921 is 12998072432378.

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 a cyclic number.

It is not a de Polignac number, because 87323427089921 - 2²⁶ = 87323359981057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87323427089981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3969246685895 + ... + 3969246685916.

It is an arithmetic number, because the mean of its divisors is an integer number (23815480115436).

Almost surely, 2^{87323427089921} is an apocalyptic number.

It is an amenable number.

87323427089921 is a deficient number, since it is larger than the sum of its proper divisors (7938493371823).

87323427089921 is a wasteful number, since it uses less digits than its factorization.

87323427089921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7938493371822.

The product of its (nonzero) digits is 73156608, while the sum is 65.

The spelling of 87323427089921 in words is "eighty-seven trillion, three hundred twenty-three billion, four hundred twenty-seven million, eighty-nine thousand, nine hundred twenty-one".