125139923887 has 8 divisors (see below), whose sum is σ = 137644515792. Its totient is φ = 113763565960.

The previous prime is 125139923861. The next prime is 125139923891. The reversal of 125139923887 is 788329931521.

It is a happy number.

It is not a de Polignac number, because 125139923887 - 2⁷ = 125139923759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125139923827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47008408 + ... + 47011069.

It is an arithmetic number, because the mean of its divisors is an integer number (17205564474).

Almost surely, 2^125139923887 is an apocalyptic number.

125139923887 is a deficient number, since it is larger than the sum of its proper divisors (12504591905).

125139923887 is an frugal number, since it uses more digits than its factorization.

125139923887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94019510 (or 94019488 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 58.

The spelling of 125139923887 in words is "one hundred twenty-five billion, one hundred thirty-nine million, nine hundred twenty-three thousand, eight hundred eighty-seven".