125279291329 has 2 divisors, whose sum is σ = 125279291330. Its totient is φ = 125279291328.

The previous prime is 125279291281. The next prime is 125279291363. The reversal of 125279291329 is 923192972521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81537660304 + 43741631025 = 285548^2 + 209145^2 .

It is a cyclic number.

It is not a de Polignac number, because 125279291329 - 2⁷ = 125279291201 is a prime.

It is not a weakly prime, because it can be changed into another prime (125279291429) 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, 62639645664 + 62639645665.

It is an arithmetic number, because the mean of its divisors is an integer number (62639645665).

Almost surely, 2^125279291329 is an apocalyptic number.

It is an amenable number.

125279291329 is a deficient number, since it is larger than the sum of its proper divisors (1).

125279291329 is an equidigital number, since it uses as much as digits as its factorization.

125279291329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1224720, while the sum is 52.

The spelling of 125279291329 in words is "one hundred twenty-five billion, two hundred seventy-nine million, two hundred ninety-one thousand, three hundred twenty-nine".