139925791 has 2 divisors, whose sum is σ = 139925792. Its totient is φ = 139925790.

The previous prime is 139925789. The next prime is 139925803. The reversal of 139925791 is 197529931.

139925791 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 139925791 - 2¹ = 139925789 is a prime.

Together with 139925789, 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 (139925761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69962895 + 69962896.

It is an arithmetic number, because the mean of its divisors is an integer number (69962896).

Almost surely, 2^139925791 is an apocalyptic number.

139925791 is a deficient number, since it is larger than the sum of its proper divisors (1).

139925791 is an equidigital number, since it uses as much as digits as its factorization.

139925791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 153090, while the sum is 46.

The square root of 139925791 is about 11829.0232479271. The cubic root of 139925791 is about 519.1576487808.

The spelling of 139925791 in words is "one hundred thirty-nine million, nine hundred twenty-five thousand, seven hundred ninety-one".