87905543 has 8 divisors (see below), whose sum is σ = 96318480. Its totient is φ = 79562880.

The previous prime is 87905527. The next prime is 87905551. The reversal of 87905543 is 34550978.

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

It is a cyclic number.

It is not a de Polignac number, because 87905543 - 2⁴ = 87905527 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87905543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87905443) 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, 14930 + ... + 19967.

It is an arithmetic number, because the mean of its divisors is an integer number (12039810).

Almost surely, 2^87905543 is an apocalyptic number.

87905543 is a deficient number, since it is larger than the sum of its proper divisors (8412937).

87905543 is a wasteful number, since it uses less digits than its factorization.

87905543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35137.

The product of its (nonzero) digits is 151200, while the sum is 41.

The square root of 87905543 is about 9375.7955929084. The cubic root of 87905543 is about 444.6368168307.

The spelling of 87905543 in words is "eighty-seven million, nine hundred five thousand, five hundred forty-three".