87123543 has 8 divisors (see below), whose sum is σ = 125100528. Its totient is φ = 53614464.

The previous prime is 87123541. The next prime is 87123559. The reversal of 87123543 is 34532178.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 87123543 - 2¹ = 87123541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87123541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1116930 + ... + 1117007.

It is an arithmetic number, because the mean of its divisors is an integer number (15637566).

Almost surely, 2^87123543 is an apocalyptic number.

87123543 is a deficient number, since it is larger than the sum of its proper divisors (37976985).

87123543 is a wasteful number, since it uses less digits than its factorization.

87123543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2233953.

The product of its digits is 20160, while the sum is 33.

The square root of 87123543 is about 9333.9993036211. Note that the first 3 decimals coincide. The cubic root of 87123543 is about 443.3144043149.

The spelling of 87123543 in words is "eighty-seven million, one hundred twenty-three thousand, five hundred forty-three".