987489190257 has 8 divisors (see below), whose sum is σ = 1316660975520. Its totient is φ = 658321765920.

The previous prime is 987489190231. The next prime is 987489190267. The reversal of 987489190257 is 752091984789.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 987489190257 - 2¹¹ = 987489188209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 987489190191 and 987489190200.

It is not an unprimeable number, because it can be changed into a prime (987489190267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 519132 + ... + 1498157.

It is an arithmetic number, because the mean of its divisors is an integer number (164582621940).

Almost surely, 2^987489190257 is an apocalyptic number.

It is an amenable number.

987489190257 is a deficient number, since it is larger than the sum of its proper divisors (329171785263).

987489190257 is a wasteful number, since it uses less digits than its factorization.

987489190257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2180463.

The product of its (nonzero) digits is 91445760, while the sum is 69.

The spelling of 987489190257 in words is "nine hundred eighty-seven billion, four hundred eighty-nine million, one hundred ninety thousand, two hundred fifty-seven".