87545543 has 2 divisors, whose sum is σ = 87545544. Its totient is φ = 87545542.

The previous prime is 87545539. The next prime is 87545587. The reversal of 87545543 is 34554578.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87545543 - 2² = 87545539 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87545543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87545503) 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 as a sum of consecutive naturals, namely, 43772771 + 43772772.

It is an arithmetic number, because the mean of its divisors is an integer number (43772772).

Almost surely, 2^87545543 is an apocalyptic number.

87545543 is a deficient number, since it is larger than the sum of its proper divisors (1).

87545543 is an equidigital number, since it uses as much as digits as its factorization.

87545543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336000, while the sum is 41.

The square root of 87545543 is about 9356.5775259974. The cubic root of 87545543 is about 444.0290119154.

It can be divided in two parts, 87545 and 543, that added together give a palindrome (88088).

The spelling of 87545543 in words is "eighty-seven million, five hundred forty-five thousand, five hundred forty-three".