981082213 has 2 divisors, whose sum is σ = 981082214. Its totient is φ = 981082212.

The previous prime is 981082199. The next prime is 981082229. The reversal of 981082213 is 312280189.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 953697924 + 27384289 = 30882^2 + 5233^2 .

It is a cyclic number.

It is not a de Polignac number, because 981082213 - 2¹³ = 981074021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (981082913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490541106 + 490541107.

It is an arithmetic number, because the mean of its divisors is an integer number (490541107).

Almost surely, 2^981082213 is an apocalyptic number.

It is an amenable number.

981082213 is a deficient number, since it is larger than the sum of its proper divisors (1).

981082213 is an equidigital number, since it uses as much as digits as its factorization.

981082213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 981082213 is about 31322.2319287754. The cubic root of 981082213 is about 993.6538829917.

The spelling of 981082213 in words is "nine hundred eighty-one million, eighty-two thousand, two hundred thirteen".