839249129 has 2 divisors, whose sum is σ = 839249130. Its totient is φ = 839249128.

The previous prime is 839249111. The next prime is 839249219. The reversal of 839249129 is 921942938.

839249129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (839249219) 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., 447407104 + 391842025 = 21152^2 + 19795^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-839249129 is a prime.

It is not a weakly prime, because it can be changed into another prime (839249629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419624564 + 419624565.

It is an arithmetic number, because the mean of its divisors is an integer number (419624565).

Almost surely, 2^839249129 is an apocalyptic number.

It is an amenable number.

839249129 is a deficient number, since it is larger than the sum of its proper divisors (1).

839249129 is an equidigital number, since it uses as much as digits as its factorization.

839249129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 47.

The square root of 839249129 is about 28969.7968408479. The cubic root of 839249129 is about 943.2575710137.

The spelling of 839249129 in words is "eight hundred thirty-nine million, two hundred forty-nine thousand, one hundred twenty-nine".