987654281 has 2 divisors, whose sum is σ = 987654282. Its totient is φ = 987654280.

The previous prime is 987654263. The next prime is 987654299. The reversal of 987654281 is 182456789.

It is a balanced prime because it is at equal distance from previous prime (987654263) and next prime (987654299).

It can be written as a sum of positive squares in only one way, i.e., 547326025 + 440328256 = 23395^2 + 20984^2 .

It is an emirp because it is prime and its reverse (182456789) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-987654281 is a prime.

It is a super-2 number, since 2×987654281² = 1950921957555253922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (987654211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493827140 + 493827141.

It is an arithmetic number, because the mean of its divisors is an integer number (493827141).

Almost surely, 2^987654281 is an apocalyptic number.

It is an amenable number.

987654281 is a deficient number, since it is larger than the sum of its proper divisors (1).

987654281 is an equidigital number, since it uses as much as digits as its factorization.

987654281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680, while the sum is 50.

The square root of 987654281 is about 31426.9674165358. The cubic root of 987654281 is about 995.8677080171.

The spelling of 987654281 in words is "nine hundred eighty-seven million, six hundred fifty-four thousand, two hundred eighty-one".