3129730399 has 2 divisors, whose sum is σ = 3129730400. Its totient is φ = 3129730398.

The previous prime is 3129730391. The next prime is 3129730411. The reversal of 3129730399 is 9930379213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3129730399 - 2³ = 3129730391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3129730391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1564865199 + 1564865200.

It is an arithmetic number, because the mean of its divisors is an integer number (1564865200).

Almost surely, 2^3129730399 is an apocalyptic number.

3129730399 is a deficient number, since it is larger than the sum of its proper divisors (1).

3129730399 is an equidigital number, since it uses as much as digits as its factorization.

3129730399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 275562, while the sum is 46.

The square root of 3129730399 is about 55943.9934130555. The cubic root of 3129730399 is about 1462.7461916275.

The spelling of 3129730399 in words is "three billion, one hundred twenty-nine million, seven hundred thirty thousand, three hundred ninety-nine".