987433549 has 2 divisors, whose sum is σ = 987433550. Its totient is φ = 987433548.

The previous prime is 987433547. The next prime is 987433571. The reversal of 987433549 is 945334789.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 979064100 + 8369449 = 31290^2 + 2893^2 .

It is a cyclic number.

It is not a de Polignac number, because 987433549 - 2¹ = 987433547 is a prime.

Together with 987433547, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 987433496 and 987433505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (987433547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493716774 + 493716775.

It is an arithmetic number, because the mean of its divisors is an integer number (493716775).

Almost surely, 2^987433549 is an apocalyptic number.

It is an amenable number.

987433549 is a deficient number, since it is larger than the sum of its proper divisors (1).

987433549 is an equidigital number, since it uses as much as digits as its factorization.

987433549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3265920, while the sum is 52.

The square root of 987433549 is about 31423.4553956117. The cubic root of 987433549 is about 995.7935132801.

The spelling of 987433549 in words is "nine hundred eighty-seven million, four hundred thirty-three thousand, five hundred forty-nine".