6919849129 has 2 divisors, whose sum is σ = 6919849130. Its totient is φ = 6919849128.

The previous prime is 6919849121. The next prime is 6919849219. The reversal of 6919849129 is 9219489196.

It is a happy number.

Together with next prime (6919849219) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6717441600 + 202407529 = 81960^2 + 14227^2 .

It is a cyclic number.

It is not a de Polignac number, because 6919849129 - 2³ = 6919849121 is a prime.

It is not a weakly prime, because it can be changed into another prime (6919849121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3459924564 + 3459924565.

It is an arithmetic number, because the mean of its divisors is an integer number (3459924565).

Almost surely, 2^6919849129 is an apocalyptic number.

It is an amenable number.

6919849129 is a deficient number, since it is larger than the sum of its proper divisors (1).

6919849129 is an equidigital number, since it uses as much as digits as its factorization.

6919849129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2519424, while the sum is 58.

The square root of 6919849129 is about 83185.6305439828. The cubic root of 6919849129 is about 1905.6020379562.

The spelling of 6919849129 in words is "six billion, nine hundred nineteen million, eight hundred forty-nine thousand, one hundred twenty-nine".