139348739 has 2 divisors, whose sum is σ = 139348740. Its totient is φ = 139348738.

The previous prime is 139348723. The next prime is 139348753. The reversal of 139348739 is 937843931.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (937843931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139348739 - 2⁴ = 139348723 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 139348693 and 139348702.

It is not a weakly prime, because it can be changed into another prime (139308739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69674369 + 69674370.

It is an arithmetic number, because the mean of its divisors is an integer number (69674370).

Almost surely, 2^139348739 is an apocalyptic number.

139348739 is a deficient number, since it is larger than the sum of its proper divisors (1).

139348739 is an equidigital number, since it uses as much as digits as its factorization.

139348739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 47.

The square root of 139348739 is about 11804.6066855275. The cubic root of 139348739 is about 518.4429991891.

The spelling of 139348739 in words is "one hundred thirty-nine million, three hundred forty-eight thousand, seven hundred thirty-nine".