139555747 has 2 divisors, whose sum is σ = 139555748. Its totient is φ = 139555746.

The previous prime is 139555733. The next prime is 139555777. The reversal of 139555747 is 747555931.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 139555747 - 2¹¹ = 139553699 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 139555697 and 139555706.

It is not a weakly prime, because it can be changed into another prime (139555727) 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, 69777873 + 69777874.

It is an arithmetic number, because the mean of its divisors is an integer number (69777874).

Almost surely, 2^139555747 is an apocalyptic number.

139555747 is a deficient number, since it is larger than the sum of its proper divisors (1).

139555747 is an equidigital number, since it uses as much as digits as its factorization.

139555747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 661500, while the sum is 46.

The square root of 139555747 is about 11813.3715339864. The cubic root of 139555747 is about 518.6995946186.

The spelling of 139555747 in words is "one hundred thirty-nine million, five hundred fifty-five thousand, seven hundred forty-seven".