650971213 has 2 divisors, whose sum is σ = 650971214. Its totient is φ = 650971212.

The previous prime is 650971193. The next prime is 650971219. The reversal of 650971213 is 312179056.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 588450564 + 62520649 = 24258^2 + 7907^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-650971213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (650971219) 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, 325485606 + 325485607.

It is an arithmetic number, because the mean of its divisors is an integer number (325485607).

Almost surely, 2^650971213 is an apocalyptic number.

It is an amenable number.

650971213 is a deficient number, since it is larger than the sum of its proper divisors (1).

650971213 is an equidigital number, since it uses as much as digits as its factorization.

650971213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 650971213 is about 25514.1375123675. The cubic root of 650971213 is about 866.6703279102.

The spelling of 650971213 in words is "six hundred fifty million, nine hundred seventy-one thousand, two hundred thirteen".