3129039869 has 2 divisors, whose sum is σ = 3129039870. Its totient is φ = 3129039868.

The previous prime is 3129039803. The next prime is 3129039877. The reversal of 3129039869 is 9689309213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2941760644 + 187279225 = 54238^2 + 13685^2 .

It is an emirp because it is prime and its reverse (9689309213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3129039869 - 2¹² = 3129035773 is a prime.

It is a super-2 number, since 2×3129039869² = 19581781003583074322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3129039889) 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, 1564519934 + 1564519935.

It is an arithmetic number, because the mean of its divisors is an integer number (1564519935).

Almost surely, 2^3129039869 is an apocalyptic number.

It is an amenable number.

3129039869 is a deficient number, since it is larger than the sum of its proper divisors (1).

3129039869 is an equidigital number, since it uses as much as digits as its factorization.

3129039869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 629856, while the sum is 50.

The square root of 3129039869 is about 55937.8214538250. The cubic root of 3129039869 is about 1462.6386057448.

The spelling of 3129039869 in words is "three billion, one hundred twenty-nine million, thirty-nine thousand, eight hundred sixty-nine".