139549727 has 2 divisors, whose sum is σ = 139549728. Its totient is φ = 139549726.

The previous prime is 139549723. The next prime is 139549741. The reversal of 139549727 is 727945931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 139549727 - 2² = 139549723 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139549723) 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, 69774863 + 69774864.

It is an arithmetic number, because the mean of its divisors is an integer number (69774864).

Almost surely, 2^139549727 is an apocalyptic number.

139549727 is a deficient number, since it is larger than the sum of its proper divisors (1).

139549727 is an equidigital number, since it uses as much as digits as its factorization.

139549727 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 476280, while the sum is 47.

The square root of 139549727 is about 11813.1167352228. The cubic root of 139549727 is about 518.6921361500.

The spelling of 139549727 in words is "one hundred thirty-nine million, five hundred forty-nine thousand, seven hundred twenty-seven".