9877381 has 2 divisors, whose sum is σ = 9877382. Its totient is φ = 9877380.

The previous prime is 9877337. The next prime is 9877393. The reversal of 9877381 is 1837789.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6604900 + 3272481 = 2570^2 + 1809^2 .

It is an emirp because it is prime and its reverse (1837789) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9877381 - 2²¹ = 7780229 is a prime.

It is a super-2 number, since 2×9877381² = 195125310838322, which contains 22 as substring.

9877381 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9877331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4938690 + 4938691.

It is an arithmetic number, because the mean of its divisors is an integer number (4938691).

Almost surely, 2^9877381 is an apocalyptic number.

It is an amenable number.

9877381 is a deficient number, since it is larger than the sum of its proper divisors (1).

9877381 is an equidigital number, since it uses as much as digits as its factorization.

9877381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 43.

The square root of 9877381 is about 3142.8300940394. The cubic root of 9877381 is about 214.5592629885.

The spelling of 9877381 in words is "nine million, eight hundred seventy-seven thousand, three hundred eighty-one".