939844649 has 2 divisors, whose sum is σ = 939844650. Its totient is φ = 939844648.

The previous prime is 939844627. The next prime is 939844663. The reversal of 939844649 is 946448939.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 938319424 + 1525225 = 30632^2 + 1235^2 .

It is a cyclic number.

It is not a de Polignac number, because 939844649 - 2¹² = 939840553 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 939844594 and 939844603.

It is not a weakly prime, because it can be changed into another prime (939844669) 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, 469922324 + 469922325.

It is an arithmetic number, because the mean of its divisors is an integer number (469922325).

Almost surely, 2^939844649 is an apocalyptic number.

It is an amenable number.

939844649 is a deficient number, since it is larger than the sum of its proper divisors (1).

939844649 is an equidigital number, since it uses as much as digits as its factorization.

939844649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6718464, while the sum is 56.

The square root of 939844649 is about 30656.8858333654. The cubic root of 939844649 is about 979.5321413164.

The spelling of 939844649 in words is "nine hundred thirty-nine million, eight hundred forty-four thousand, six hundred forty-nine".