87898013 has 12 divisors (see below), whose sum is σ = 102849660. Its totient is φ = 74898432.

The previous prime is 87898003. The next prime is 87898021. The reversal of 87898013 is 31089878.

It can be written as a sum of positive squares in 2 ways, for example, as 40934404 + 46963609 = 6398^2 + 6853^2 .

It is not a de Polignac number, because 87898013 - 2¹⁶ = 87832477 is a prime.

It is a super-3 number, since 3×87898013³ (a number of 25 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87898003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3293 + ... + 13661.

It is an arithmetic number, because the mean of its divisors is an integer number (8570805).

Almost surely, 2^87898013 is an apocalyptic number.

It is an amenable number.

87898013 is a deficient number, since it is larger than the sum of its proper divisors (14951647).

87898013 is a wasteful number, since it uses less digits than its factorization.

87898013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10556 (or 10549 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 44.

The square root of 87898013 is about 9375.3940183866. The cubic root of 87898013 is about 444.6241205861.

The spelling of 87898013 in words is "eighty-seven million, eight hundred ninety-eight thousand, thirteen".