987091543 has 2 divisors, whose sum is σ = 987091544. Its totient is φ = 987091542.

The previous prime is 987091537. The next prime is 987091571. The reversal of 987091543 is 345190789.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (345190789) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 987091543 - 2²⁵ = 953537111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 987091493 and 987091502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (987094543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493545771 + 493545772.

It is an arithmetic number, because the mean of its divisors is an integer number (493545772).

Almost surely, 2^987091543 is an apocalyptic number.

987091543 is a deficient number, since it is larger than the sum of its proper divisors (1).

987091543 is an equidigital number, since it uses as much as digits as its factorization.

987091543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 987091543 is about 31418.0130339269. The cubic root of 987091543 is about 995.6785328227.

The spelling of 987091543 in words is "nine hundred eighty-seven million, ninety-one thousand, five hundred forty-three".