9892121 has 2 divisors, whose sum is σ = 9892122. Its totient is φ = 9892120.

The previous prime is 9892087. The next prime is 9892151. The reversal of 9892121 is 1212989.

It is a happy number.

9892121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8637721 + 1254400 = 2939^2 + 1120^2 .

It is an emirp because it is prime and its reverse (1212989) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9892121 - 2¹⁰ = 9891097 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (9892151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4946060 + 4946061.

It is an arithmetic number, because the mean of its divisors is an integer number (4946061).

Almost surely, 2^9892121 is an apocalyptic number.

It is an amenable number.

9892121 is a deficient number, since it is larger than the sum of its proper divisors (1).

9892121 is an equidigital number, since it uses as much as digits as its factorization.

9892121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 32.

The square root of 9892121 is about 3145.1742400064. The cubic root of 9892121 is about 214.6659387580.

The spelling of 9892121 in words is "nine million, eight hundred ninety-two thousand, one hundred twenty-one".