90200213 has 2 divisors, whose sum is σ = 90200214. Its totient is φ = 90200212.

The previous prime is 90200189. The next prime is 90200219. The reversal of 90200213 is 31200209.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87179569 + 3020644 = 9337^2 + 1738^2 .

It is an emirp because it is prime and its reverse (31200209) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90200213 - 2⁸ = 90199957 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 90200191 and 90200200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90200219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45100106 + 45100107.

It is an arithmetic number, because the mean of its divisors is an integer number (45100107).

Almost surely, 2^90200213 is an apocalyptic number.

It is an amenable number.

90200213 is a deficient number, since it is larger than the sum of its proper divisors (1).

90200213 is an equidigital number, since it uses as much as digits as its factorization.

90200213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 90200213 is about 9497.3792700934. The cubic root of 90200213 is about 448.4725379827.

The spelling of 90200213 in words is "ninety million, two hundred thousand, two hundred thirteen".