939630217 has 2 divisors, whose sum is σ = 939630218. Its totient is φ = 939630216.

The previous prime is 939630203. The next prime is 939630221. The reversal of 939630217 is 712036939.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 732730761 + 206899456 = 27069^2 + 14384^2 .

It is a cyclic number.

It is not a de Polignac number, because 939630217 - 2⁷ = 939630089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 939630217.

It is not a weakly prime, because it can be changed into another prime (939640217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 469815108 + 469815109.

It is an arithmetic number, because the mean of its divisors is an integer number (469815109).

Almost surely, 2^939630217 is an apocalyptic number.

It is an amenable number.

939630217 is a deficient number, since it is larger than the sum of its proper divisors (1).

939630217 is an equidigital number, since it uses as much as digits as its factorization.

939630217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61236, while the sum is 40.

The square root of 939630217 is about 30653.3883445207. The cubic root of 939630217 is about 979.4576399922.

The spelling of 939630217 in words is "nine hundred thirty-nine million, six hundred thirty thousand, two hundred seventeen".