87921493143 has 16 divisors (see below), whose sum is σ = 129017546496. Its totient is φ = 52814195840.

The previous prime is 87921493139. The next prime is 87921493229. The reversal of 87921493143 is 34139412978.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 87921493143 - 2² = 87921493139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87921493643) 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 15 ways as a sum of consecutive naturals, for example, 11785155 + ... + 11792612.

It is an arithmetic number, because the mean of its divisors is an integer number (8063596656).

Almost surely, 2^87921493143 is an apocalyptic number.

87921493143 is a deficient number, since it is larger than the sum of its proper divisors (41096053353).

87921493143 is a wasteful number, since it uses less digits than its factorization.

87921493143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23577894.

The product of its digits is 1306368, while the sum is 51.

The spelling of 87921493143 in words is "eighty-seven billion, nine hundred twenty-one million, four hundred ninety-three thousand, one hundred forty-three".