139334387 has 2 divisors, whose sum is σ = 139334388. Its totient is φ = 139334386.

The previous prime is 139334323. The next prime is 139334413. The reversal of 139334387 is 783433931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 139334387 - 2⁶ = 139334323 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (139334887) 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, 69667193 + 69667194.

It is an arithmetic number, because the mean of its divisors is an integer number (69667194).

Almost surely, 2^139334387 is an apocalyptic number.

139334387 is a deficient number, since it is larger than the sum of its proper divisors (1).

139334387 is an equidigital number, since it uses as much as digits as its factorization.

139334387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 41.

The square root of 139334387 is about 11803.9987716028. The cubic root of 139334387 is about 518.4251998428.

The spelling of 139334387 in words is "one hundred thirty-nine million, three hundred thirty-four thousand, three hundred eighty-seven".