125838786839 has 4 divisors (see below), whose sum is σ = 125839515456. Its totient is φ = 125838058224.

The previous prime is 125838786737. The next prime is 125838786967. The reversal of 125838786839 is 938687838521.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 125838786839 - 2⁸ = 125838786583 is a prime.

It is a super-2 number, since 2×125838786839² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125838786439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57722 + ... + 504984.

It is an arithmetic number, because the mean of its divisors is an integer number (31459878864).

Almost surely, 2^125838786839 is an apocalyptic number.

125838786839 is a deficient number, since it is larger than the sum of its proper divisors (728617).

125838786839 is an equidigital number, since it uses as much as digits as its factorization.

125838786839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728616.

The product of its digits is 139345920, while the sum is 68.

The spelling of 125838786839 in words is "one hundred twenty-five billion, eight hundred thirty-eight million, seven hundred eighty-six thousand, eight hundred thirty-nine".