987934405 has 4 divisors (see below), whose sum is σ = 1185521292. Its totient is φ = 790347520.

The previous prime is 987934403. The next prime is 987934459. The reversal of 987934405 is 504439789.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 126922756 + 861011649 = 11266^2 + 29343^2 .

It is not a de Polignac number, because 987934405 - 2¹ = 987934403 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987934403) 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 in 3 ways as a sum of consecutive naturals, for example, 98793436 + ... + 98793445.

It is an arithmetic number, because the mean of its divisors is an integer number (296380323).

Almost surely, 2^987934405 is an apocalyptic number.

It is an amenable number.

987934405 is a deficient number, since it is larger than the sum of its proper divisors (197586887).

987934405 is a wasteful number, since it uses less digits than its factorization.

987934405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197586886.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The square root of 987934405 is about 31431.4238462084. The cubic root of 987934405 is about 995.9618502965.

The spelling of 987934405 in words is "nine hundred eighty-seven million, nine hundred thirty-four thousand, four hundred five".