987880251 has 16 divisors (see below), whose sum is σ = 1395424800. Its totient is φ = 619504128.

The previous prime is 987880241. The next prime is 987880253. The reversal of 987880251 is 152088789.

It is not a de Polignac number, because 987880251 - 2¹⁴ = 987863867 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 987880251.

It is not an unprimeable number, because it can be changed into a prime (987880253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113565 + ... + 121953.

It is an arithmetic number, because the mean of its divisors is an integer number (87214050).

Almost surely, 2^987880251 is an apocalyptic number.

987880251 is a deficient number, since it is larger than the sum of its proper divisors (407544549).

987880251 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (987880250) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (10718).

987880251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10718.

The product of its (nonzero) digits is 322560, while the sum is 48.

The square root of 987880251 is about 31430.5623716789. The cubic root of 987880251 is about 995.9436519549.

The spelling of 987880251 in words is "nine hundred eighty-seven million, eight hundred eighty thousand, two hundred fifty-one".