9131021 has 2 divisors, whose sum is σ = 9131022. Its totient is φ = 9131020.

The previous prime is 9131011. The next prime is 9131033. The reversal of 9131021 is 1201319.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8584900 + 546121 = 2930^2 + 739^2 .

It is a cyclic number.

It is not a de Polignac number, because 9131021 - 2¹⁰ = 9129997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9131011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4565510 + 4565511.

It is an arithmetic number, because the mean of its divisors is an integer number (4565511).

Almost surely, 2^9131021 is an apocalyptic number.

It is an amenable number.

9131021 is a deficient number, since it is larger than the sum of its proper divisors (1).

9131021 is an equidigital number, since it uses as much as digits as its factorization.

9131021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 9131021 is about 3021.7579320654. The cubic root of 9131021 is about 209.0129109947.

The spelling of 9131021 in words is "nine million, one hundred thirty-one thousand, twenty-one".