87398483021 has 6 divisors (see below), whose sum is σ = 92240504622. Its totient is φ = 82798562520.

The previous prime is 87398482999. The next prime is 87398483069. The reversal of 87398483021 is 12038489378.

It can be written as a sum of positive squares in only one way, i.e., 82639000900 + 4759482121 = 287470^2 + 68989^2 .

It is a de Polignac number, because none of the positive numbers 2^k-87398483021 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 (87398483321) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 121050170 + ... + 121050891.

It is an arithmetic number, because the mean of its divisors is an integer number (15373417437).

Almost surely, 2^87398483021 is an apocalyptic number.

It is an amenable number.

87398483021 is a deficient number, since it is larger than the sum of its proper divisors (4842021601).

87398483021 is a wasteful number, since it uses less digits than its factorization.

87398483021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242101099 (or 242101080 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 53.

The spelling of 87398483021 in words is "eighty-seven billion, three hundred ninety-eight million, four hundred eighty-three thousand, twenty-one".