87913917487 has 16 divisors (see below), whose sum is σ = 103909208832. Its totient is φ = 73471144320.

The previous prime is 87913917439. The next prime is 87913917547. The reversal of 87913917487 is 78471931978.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87913917487 is a prime.

It is a super-2 number, since 2×87913917487² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87913917587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5458563 + ... + 5474644.

It is an arithmetic number, because the mean of its divisors is an integer number (6494325552).

Almost surely, 2^87913917487 is an apocalyptic number.

87913917487 is a deficient number, since it is larger than the sum of its proper divisors (15995291345).

87913917487 is a wasteful number, since it uses less digits than its factorization.

87913917487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10933278.

The product of its digits is 21337344, while the sum is 64.

The spelling of 87913917487 in words is "eighty-seven billion, nine hundred thirteen million, nine hundred seventeen thousand, four hundred eighty-seven".