125116813 has 2 divisors, whose sum is σ = 125116814. Its totient is φ = 125116812.

The previous prime is 125116811. The next prime is 125116853. The reversal of 125116813 is 318611521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107702884 + 17413929 = 10378^2 + 4173^2 .

It is a cyclic number.

It is not a de Polignac number, because 125116813 - 2¹ = 125116811 is a prime.

Together with 125116811, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125116811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62558406 + 62558407.

It is an arithmetic number, because the mean of its divisors is an integer number (62558407).

Almost surely, 2^125116813 is an apocalyptic number.

It is an amenable number.

125116813 is a deficient number, since it is larger than the sum of its proper divisors (1).

125116813 is an equidigital number, since it uses as much as digits as its factorization.

125116813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 28.

The square root of 125116813 is about 11185.5627037713. The cubic root of 125116813 is about 500.1557021753.

The spelling of 125116813 in words is "one hundred twenty-five million, one hundred sixteen thousand, eight hundred thirteen".