125306789 has 2 divisors, whose sum is σ = 125306790. Its totient is φ = 125306788.

The previous prime is 125306771. The next prime is 125306791. The reversal of 125306789 is 987603521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119464900 + 5841889 = 10930^2 + 2417^2 .

It is an emirp because it is prime and its reverse (987603521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125306789 - 2²⁴ = 108529573 is a prime.

Together with 125306791, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125306759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62653394 + 62653395.

It is an arithmetic number, because the mean of its divisors is an integer number (62653395).

Almost surely, 2^125306789 is an apocalyptic number.

It is an amenable number.

125306789 is a deficient number, since it is larger than the sum of its proper divisors (1).

125306789 is an equidigital number, since it uses as much as digits as its factorization.

125306789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 125306789 is about 11194.0515006855. The cubic root of 125306789 is about 500.4087178085.

The spelling of 125306789 in words is "one hundred twenty-five million, three hundred six thousand, seven hundred eighty-nine".