87251234539 has 4 divisors (see below), whose sum is σ = 99715696624. Its totient is φ = 74786772456.

The previous prime is 87251234533. The next prime is 87251234549. The reversal of 87251234539 is 93543215278.

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

It is a cyclic number.

It is not a de Polignac number, because 87251234539 - 2⁵ = 87251234507 is a prime.

It is a super-2 number, since 2×87251234539² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87251234492 and 87251234501.

It is not an unprimeable number, because it can be changed into a prime (87251234533) 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 3 ways as a sum of consecutive naturals, for example, 6232231032 + ... + 6232231045.

It is an arithmetic number, because the mean of its divisors is an integer number (24928924156).

Almost surely, 2^87251234539 is an apocalyptic number.

87251234539 is a deficient number, since it is larger than the sum of its proper divisors (12464462085).

87251234539 is a wasteful number, since it uses less digits than its factorization.

87251234539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12464462084.

The product of its digits is 1814400, while the sum is 49.

The spelling of 87251234539 in words is "eighty-seven billion, two hundred fifty-one million, two hundred thirty-four thousand, five hundred thirty-nine".