9500021 has 2 divisors, whose sum is σ = 9500022. Its totient is φ = 9500020.

The previous prime is 9499967. The next prime is 9500041. The reversal of 9500021 is 1200059.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7623121 + 1876900 = 2761^2 + 1370^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9500021 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9500041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4750010 + 4750011.

It is an arithmetic number, because the mean of its divisors is an integer number (4750011).

Almost surely, 2^9500021 is an apocalyptic number.

It is an amenable number.

9500021 is a deficient number, since it is larger than the sum of its proper divisors (1).

9500021 is an equidigital number, since it uses as much as digits as its factorization.

9500021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 9500021 is about 3082.2104081324. The cubic root of 9500021 is about 211.7913352693.

The spelling of 9500021 in words is "nine million, five hundred thousand, twenty-one".