87109859213 has 4 divisors (see below), whose sum is σ = 93810617628. Its totient is φ = 80409100800.

The previous prime is 87109859159. The next prime is 87109859231. The reversal of 87109859213 is 31295890178.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 28624240969 + 58485618244 = 169187^2 + 241838^2 .

It is a cyclic number.

It is not a de Polignac number, because 87109859213 - 2²⁰ = 87108810637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87109859513) 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, 3350379188 + ... + 3350379213.

It is an arithmetic number, because the mean of its divisors is an integer number (23452654407).

Almost surely, 2^87109859213 is an apocalyptic number.

It is an amenable number.

87109859213 is a deficient number, since it is larger than the sum of its proper divisors (6700758415).

87109859213 is a wasteful number, since it uses less digits than its factorization.

87109859213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6700758414.

The product of its (nonzero) digits is 1088640, while the sum is 53.

The spelling of 87109859213 in words is "eighty-seven billion, one hundred nine million, eight hundred fifty-nine thousand, two hundred thirteen".