3129843349 has 2 divisors, whose sum is σ = 3129843350. Its totient is φ = 3129843348.

The previous prime is 3129843347. The next prime is 3129843389. The reversal of 3129843349 is 9433489213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3129843025 + 324 = 55945^2 + 18^2 .

It is an emirp because it is prime and its reverse (9433489213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3129843349 - 2¹ = 3129843347 is a prime.

Together with 3129843347, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 3129843299 and 3129843308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3129843347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1564921674 + 1564921675.

It is an arithmetic number, because the mean of its divisors is an integer number (1564921675).

Almost surely, 2^3129843349 is an apocalyptic number.

It is an amenable number.

3129843349 is a deficient number, since it is larger than the sum of its proper divisors (1).

3129843349 is an equidigital number, since it uses as much as digits as its factorization.

3129843349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 559872, while the sum is 46.

The square root of 3129843349 is about 55945.0028957011. The cubic root of 3129843349 is about 1462.7637879456.

It can be divided in two parts, 31298 and 43349, that added together give a palindrome (74647).

The spelling of 3129843349 in words is "three billion, one hundred twenty-nine million, eight hundred forty-three thousand, three hundred forty-nine".