9978229 has 2 divisors, whose sum is σ = 9978230. Its totient is φ = 9978228.

The previous prime is 9978223. The next prime is 9978277. The reversal of 9978229 is 9228799.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7344100 + 2634129 = 2710^2 + 1623^2 .

It is a cyclic number.

It is not a de Polignac number, because 9978229 - 2¹⁵ = 9945461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9978223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4989114 + 4989115.

It is an arithmetic number, because the mean of its divisors is an integer number (4989115).

Almost surely, 2^9978229 is an apocalyptic number.

It is an amenable number.

9978229 is a deficient number, since it is larger than the sum of its proper divisors (1).

9978229 is an equidigital number, since it uses as much as digits as its factorization.

9978229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 46.

The square root of 9978229 is about 3158.8334872228. The cubic root of 9978229 is about 215.2870080790.

The spelling of 9978229 in words is "nine million, nine hundred seventy-eight thousand, two hundred twenty-nine".