125018209829 has 2 divisors, whose sum is σ = 125018209830. Its totient is φ = 125018209828.

The previous prime is 125018209711. The next prime is 125018209873. The reversal of 125018209829 is 928902810521.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73223277604 + 51794932225 = 270598^2 + 227585^2 .

It is a cyclic number.

It is not a de Polignac number, because 125018209829 - 2²⁰ = 125017161253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125018209529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62509104914 + 62509104915.

It is an arithmetic number, because the mean of its divisors is an integer number (62509104915).

Almost surely, 2^125018209829 is an apocalyptic number.

It is an amenable number.

125018209829 is a deficient number, since it is larger than the sum of its proper divisors (1).

125018209829 is an equidigital number, since it uses as much as digits as its factorization.

125018209829 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 47.

The spelling of 125018209829 in words is "one hundred twenty-five billion, eighteen million, two hundred nine thousand, eight hundred twenty-nine".