87040543 has 2 divisors, whose sum is σ = 87040544. Its totient is φ = 87040542.

The previous prime is 87040537. The next prime is 87040559. The reversal of 87040543 is 34504078.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87040543 is a prime.

It is a super-2 number, since 2×87040543² = 15152112251469698, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87640543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43520271 + 43520272.

It is an arithmetic number, because the mean of its divisors is an integer number (43520272).

Almost surely, 2^87040543 is an apocalyptic number.

87040543 is a deficient number, since it is larger than the sum of its proper divisors (1).

87040543 is an equidigital number, since it uses as much as digits as its factorization.

87040543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 87040543 is about 9329.5521328733. The cubic root of 87040543 is about 443.1735821176.

The spelling of 87040543 in words is "eighty-seven million, forty thousand, five hundred forty-three".