987397863 has 16 divisors (see below), whose sum is σ = 1369991040. Its totient is φ = 632054304.

The previous prime is 987397811. The next prime is 987397883. The reversal of 987397863 is 368793789.

It is not a de Polignac number, because 987397863 - 2¹⁶ = 987332327 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 987397797 and 987397806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987397883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57256 + ... + 72477.

It is an arithmetic number, because the mean of its divisors is an integer number (85624440).

Almost surely, 2^987397863 is an apocalyptic number.

987397863 is a deficient number, since it is larger than the sum of its proper divisors (382593177).

987397863 is a wasteful number, since it uses less digits than its factorization.

987397863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129838.

The product of its digits is 13716864, while the sum is 60.

The square root of 987397863 is about 31422.8875662311. The cubic root of 987397863 is about 995.7815170921.

The spelling of 987397863 in words is "nine hundred eighty-seven million, three hundred ninety-seven thousand, eight hundred sixty-three".