9977213 has 2 divisors, whose sum is σ = 9977214. Its totient is φ = 9977212.

The previous prime is 9977203. The next prime is 9977237. The reversal of 9977213 is 3127799.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6744409 + 3232804 = 2597^2 + 1798^2 .

It is a cyclic number.

It is not a de Polignac number, because 9977213 - 2¹⁶ = 9911677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9977203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4988606 + 4988607.

It is an arithmetic number, because the mean of its divisors is an integer number (4988607).

Almost surely, 2^9977213 is an apocalyptic number.

It is an amenable number.

9977213 is a deficient number, since it is larger than the sum of its proper divisors (1).

9977213 is an equidigital number, since it uses as much as digits as its factorization.

9977213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23814, while the sum is 38.

The square root of 9977213 is about 3158.6726642690. The cubic root of 9977213 is about 215.2797008697.

The spelling of 9977213 in words is "nine million, nine hundred seventy-seven thousand, two hundred thirteen".