87388998481 has 4 divisors (see below), whose sum is σ = 90207998464. Its totient is φ = 84569998500.

The previous prime is 87388998461. The next prime is 87388998493. The reversal of 87388998481 is 18489988378.

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 87388998481 - 2²⁵ = 87355444049 is a prime.

It is a super-2 number, since 2×87388998481² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87388998461) 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, 1409499945 + ... + 1409500006.

It is an arithmetic number, because the mean of its divisors is an integer number (22551999616).

Almost surely, 2^87388998481 is an apocalyptic number.

It is an amenable number.

87388998481 is a deficient number, since it is larger than the sum of its proper divisors (2818999983).

87388998481 is a wasteful number, since it uses less digits than its factorization.

87388998481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2818999982.

The product of its digits is 222953472, while the sum is 73.

The spelling of 87388998481 in words is "eighty-seven billion, three hundred eighty-eight million, nine hundred ninety-eight thousand, four hundred eighty-one".