139553839 has 2 divisors, whose sum is σ = 139553840. Its totient is φ = 139553838.

The previous prime is 139553789. The next prime is 139553891. The reversal of 139553839 is 938355931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 139553839 - 2¹⁹ = 139029551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139553339) 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, 69776919 + 69776920.

It is an arithmetic number, because the mean of its divisors is an integer number (69776920).

Almost surely, 2^139553839 is an apocalyptic number.

139553839 is a deficient number, since it is larger than the sum of its proper divisors (1).

139553839 is an equidigital number, since it uses as much as digits as its factorization.

139553839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 437400, while the sum is 46.

The square root of 139553839 is about 11813.2907777638. The cubic root of 139553839 is about 518.6972307285.

The spelling of 139553839 in words is "one hundred thirty-nine million, five hundred fifty-three thousand, eight hundred thirty-nine".