987240047 has 4 divisors (see below), whose sum is σ = 987474096. Its totient is φ = 987006000.

The previous prime is 987240013. The next prime is 987240049. The reversal of 987240047 is 740042789.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 740042789 = 61 ⋅12131849.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-987240047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 987239986 and 987240013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987240049) 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, 110579 + ... + 119172.

It is an arithmetic number, because the mean of its divisors is an integer number (246868524).

Almost surely, 2^987240047 is an apocalyptic number.

987240047 is a deficient number, since it is larger than the sum of its proper divisors (234049).

987240047 is a wasteful number, since it uses less digits than its factorization.

987240047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234048.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 987240047 is about 31420.3763026479. The cubic root of 987240047 is about 995.7284622784.

The spelling of 987240047 in words is "nine hundred eighty-seven million, two hundred forty thousand, forty-seven".