139925789 has 2 divisors, whose sum is σ = 139925790. Its totient is φ = 139925788.

The previous prime is 139925761. The next prime is 139925791. The reversal of 139925789 is 987529931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71995225 + 67930564 = 8485^2 + 8242^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139925789 is a prime.

Together with 139925791, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 139925789.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139925189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69962894 + 69962895.

It is an arithmetic number, because the mean of its divisors is an integer number (69962895).

Almost surely, 2^139925789 is an apocalyptic number.

It is an amenable number.

139925789 is a deficient number, since it is larger than the sum of its proper divisors (1).

139925789 is an equidigital number, since it uses as much as digits as its factorization.

139925789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1224720, while the sum is 53.

The square root of 139925789 is about 11829.0231633893. The cubic root of 139925789 is about 519.1576463073.

The spelling of 139925789 in words is "one hundred thirty-nine million, nine hundred twenty-five thousand, seven hundred eighty-nine".