3939430709 has 2 divisors, whose sum is σ = 3939430710. Its totient is φ = 3939430708.

The previous prime is 3939430697. The next prime is 3939430717. The reversal of 3939430709 is 9070349393.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2596208209 + 1343222500 = 50953^2 + 36650^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3939430709 is a prime.

It is a super-2 number, since 2×3939430709² = 31038228622024485362, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3939430739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1969715354 + 1969715355.

It is an arithmetic number, because the mean of its divisors is an integer number (1969715355).

Almost surely, 2^3939430709 is an apocalyptic number.

It is an amenable number.

3939430709 is a deficient number, since it is larger than the sum of its proper divisors (1).

3939430709 is an equidigital number, since it uses as much as digits as its factorization.

3939430709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 551124, while the sum is 47.

The square root of 3939430709 is about 62764.8843621973. The cubic root of 3939430709 is about 1579.3479535861.

The spelling of 3939430709 in words is "three billion, nine hundred thirty-nine million, four hundred thirty thousand, seven hundred nine".