9877213 has 2 divisors, whose sum is σ = 9877214. Its totient is φ = 9877212.

The previous prime is 9877211. The next prime is 9877223. The reversal of 9877213 is 3127789.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6335289 + 3541924 = 2517^2 + 1882^2 .

It is a cyclic number.

It is not a de Polignac number, because 9877213 - 2¹ = 9877211 is a prime.

Together with 9877211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9877211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4938606 + 4938607.

It is an arithmetic number, because the mean of its divisors is an integer number (4938607).

Almost surely, 2^9877213 is an apocalyptic number.

It is an amenable number.

9877213 is a deficient number, since it is larger than the sum of its proper divisors (1).

9877213 is an equidigital number, since it uses as much as digits as its factorization.

9877213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21168, while the sum is 37.

The square root of 9877213 is about 3142.8033664230. The cubic root of 9877213 is about 214.5580465338.

The spelling of 9877213 in words is "nine million, eight hundred seventy-seven thousand, two hundred thirteen".