125845917929 has 2 divisors, whose sum is σ = 125845917930. Its totient is φ = 125845917928.

The previous prime is 125845917917. The next prime is 125845917931. The reversal of 125845917929 is 929719548521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125291221225 + 554696704 = 353965^2 + 23552^2 .

It is an emirp because it is prime and its reverse (929719548521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125845917929 is a prime.

It is a Sophie Germain prime.

Together with 125845917931, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (125845517929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62922958964 + 62922958965.

It is an arithmetic number, because the mean of its divisors is an integer number (62922958965).

Almost surely, 2^125845917929 is an apocalyptic number.

It is an amenable number.

125845917929 is a deficient number, since it is larger than the sum of its proper divisors (1).

125845917929 is an equidigital number, since it uses as much as digits as its factorization.

125845917929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16329600, while the sum is 62.

The spelling of 125845917929 in words is "one hundred twenty-five billion, eight hundred forty-five million, nine hundred seventeen thousand, nine hundred twenty-nine".