87481543 has 2 divisors, whose sum is σ = 87481544. Its totient is φ = 87481542.

The previous prime is 87481531. The next prime is 87481553. The reversal of 87481543 is 34518478.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87481543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87481496 and 87481505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87481553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43740771 + 43740772.

It is an arithmetic number, because the mean of its divisors is an integer number (43740772).

Almost surely, 2^87481543 is an apocalyptic number.

87481543 is a deficient number, since it is larger than the sum of its proper divisors (1).

87481543 is an equidigital number, since it uses as much as digits as its factorization.

87481543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 107520, while the sum is 40.

The square root of 87481543 is about 9353.1568467550. The cubic root of 87481543 is about 443.9207833540.

The spelling of 87481543 in words is "eighty-seven million, four hundred eighty-one thousand, five hundred forty-three".