876530981 has 2 divisors, whose sum is σ = 876530982. Its totient is φ = 876530980.

The previous prime is 876530957. The next prime is 876531001. The reversal of 876530981 is 189035678.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 787700356 + 88830625 = 28066^2 + 9425^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-876530981 is a prime.

It is a super-3 number, since 3×876530981³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (876530911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 438265490 + 438265491.

It is an arithmetic number, because the mean of its divisors is an integer number (438265491).

Almost surely, 2^876530981 is an apocalyptic number.

It is an amenable number.

876530981 is a deficient number, since it is larger than the sum of its proper divisors (1).

876530981 is an equidigital number, since it uses as much as digits as its factorization.

876530981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 876530981 is about 29606.2659077432. The cubic root of 876530981 is about 957.0231065991.

The spelling of 876530981 in words is "eight hundred seventy-six million, five hundred thirty thousand, nine hundred eighty-one".